7991265 has 8 divisors (see below), whose sum is σ = 12786048. Its totient is φ = 4262000.

The previous prime is 7991257. The next prime is 7991303. The reversal of 7991265 is 5621997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7991265 - 2³ = 7991257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266361 + ... + 266390.

It is an arithmetic number, because the mean of its divisors is an integer number (1598256).

Almost surely, 2^7991265 is an apocalyptic number.

It is an amenable number.

7991265 is a deficient number, since it is larger than the sum of its proper divisors (4794783).

7991265 is a wasteful number, since it uses less digits than its factorization.

7991265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532759.

The product of its digits is 34020, while the sum is 39.

The square root of 7991265 is about 2826.8825585793. The cubic root of 7991265 is about 199.9271818241.

It can be divided in two parts, 7991 and 265, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 7991265 in words is "seven million, nine hundred ninety-one thousand, two hundred sixty-five".