65257497 has 6 divisors (see below), whose sum is σ = 94260842. Its totient is φ = 43504992.

The previous prime is 65257487. The next prime is 65257541. The reversal of 65257497 is 79475256.

It can be written as a sum of positive squares in only one way, i.e., 65221776 + 35721 = 8076^2 + 189^2 .

It is not a de Polignac number, because 65257497 - 2⁷ = 65257369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65257487) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3625408 + ... + 3625425.

Almost surely, 2^65257497 is an apocalyptic number.

It is an amenable number.

65257497 is a deficient number, since it is larger than the sum of its proper divisors (29003345).

65257497 is a wasteful number, since it uses less digits than its factorization.

65257497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7250839 (or 7250836 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 65257497 is about 8078.2112500231. The cubic root of 65257497 is about 402.6028121039.

The spelling of 65257497 in words is "sixty-five million, two hundred fifty-seven thousand, four hundred ninety-seven".