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7080921 = 328872
BaseRepresentation
bin11011000000101111011001
3111022202012100
4123000233121
53303042141
6411434013
7114121041
oct33005731
914282170
107080921
113aa7001
122455909
13160bcc3
14d24721
1594d0b6
hex6c0bd9

7080921 has 9 divisors (see below), whose sum is σ = 10239541. Its totient is φ = 4715292.

The previous prime is 7080907. The next prime is 7080923. The reversal of 7080921 is 1290807.

The square root of 7080921 is 2661.

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

7080921 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 7080921 - 25 = 7080889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7080923) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7540 + ... + 8426.

Almost surely, 27080921 is an apocalyptic number.

7080921 is the 2661-st square number.

7080921 is the 1331-st centered octagonal number.

It is an amenable number.

7080921 is a deficient number, since it is larger than the sum of its proper divisors (3158620).

7080921 is an frugal number, since it uses more digits than its factorization.

7080921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The cubic root of 7080921 is about 192.0274212138.

It can be divided in two parts, 7080 and 921, that added together give a triangular number (8001 = T126).

The spelling of 7080921 in words is "seven million, eighty thousand, nine hundred twenty-one".

Divisors: 1 3 9 887 2661 7983 786769 2360307 7080921