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7623121 = 1122512
BaseRepresentation
bin11101000101000111010001
3112100021221211
4131011013101
53422414441
6431220121
7121536562
oct35050721
915307854
107623121
114337400
122677641
13176ba2c
141026169
15a08a81
hex7451d1

7623121 has 9 divisors (see below), whose sum is σ = 8412649. Its totient is φ = 6902500.

The previous prime is 7623113. The next prime is 7623127. The reversal of 7623121 is 1213267.

The square root of 7623121 is 2761.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 7623121 - 23 = 7623113 is a prime.

It is a super-2 number, since 2×76231212 = 116223947561282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7623092 and 7623101.

It is not an unprimeable number, because it can be changed into a prime (7623127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30246 + ... + 30496.

Almost surely, 27623121 is an apocalyptic number.

7623121 is the 2761-st square number.

7623121 is the 1381-st centered octagonal number.

It is an amenable number.

7623121 is a deficient number, since it is larger than the sum of its proper divisors (789528).

7623121 is an equidigital number, since it uses as much as digits as its factorization.

7623121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 262 counting only the distinct ones).

The product of its digits is 504, while the sum is 22.

The cubic root of 7623121 is about 196.8086902242.

Adding to 7623121 its reverse (1213267), we get a palindrome (8836388).

It can be divided in two parts, 7623 and 121, that added together give a square (7744 = 882).

The spelling of 7623121 in words is "seven million, six hundred twenty-three thousand, one hundred twenty-one".

Divisors: 1 11 121 251 2761 30371 63001 693011 7623121