7977265 has 4 divisors (see below), whose sum is σ = 9572724. Its totient is φ = 6381808.

The previous prime is 7977259. The next prime is 7977271. The reversal of 7977265 is 5627797.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (7977259) and next prime (7977271).

It can be written as a sum of positive squares in 2 ways, for example, as 6105841 + 1871424 = 2471^2 + 1368^2 .

It is a cyclic number.

It is not a de Polignac number, because 7977265 - 2⁹ = 7976753 is a prime.

It is a Duffinian number.

7977265 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797722 + ... + 797731.

It is an arithmetic number, because the mean of its divisors is an integer number (2393181).

Almost surely, 2^7977265 is an apocalyptic number.

It is an amenable number.

7977265 is a deficient number, since it is larger than the sum of its proper divisors (1595459).

7977265 is a wasteful number, since it uses less digits than its factorization.

7977265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595458.

The product of its digits is 185220, while the sum is 43.

The square root of 7977265 is about 2824.4052471273. The cubic root of 7977265 is about 199.8103619105.

The spelling of 7977265 in words is "seven million, nine hundred seventy-seven thousand, two hundred sixty-five".