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122513 = 1011213
BaseRepresentation
bin11101111010010001
320020001112
4131322101
512410023
62343105
71020116
oct357221
9206045
10122513
1184056
125aa95
13439c1
143290d
1526478
hex1de91

122513 has 4 divisors (see below), whose sum is σ = 123828. Its totient is φ = 121200.

The previous prime is 122509. The next prime is 122527. The reversal of 122513 is 315221.

122513 = 2472 + 2482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315221 = 1013121.

It can be written as a sum of positive squares in 2 ways, for example, as 61504 + 61009 = 248^2 + 247^2 .

It is not a de Polignac number, because 122513 - 22 = 122509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506 + ... + 707.

It is an arithmetic number, because the mean of its divisors is an integer number (30957).

2122513 is an apocalyptic number.

122513 is the 248-th centered square number.

It is an amenable number.

122513 is a deficient number, since it is larger than the sum of its proper divisors (1315).

122513 is a wasteful number, since it uses less digits than its factorization.

122513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314.

The product of its digits is 60, while the sum is 14.

The square root of 122513 is about 350.0185709359. The cubic root of 122513 is about 49.6661761934. Note that the first 3 decimals are identical.

Adding to 122513 its reverse (315221), we get a palindrome (437734).

The spelling of 122513 in words is "one hundred twenty-two thousand, five hundred thirteen".

Divisors: 1 101 1213 122513