65172025 has 6 divisors (see below), whose sum is σ = 80813342. Its totient is φ = 52137600.

The previous prime is 65172017. The next prime is 65172043. The reversal of 65172025 is 52027156.

It can be written as a sum of positive squares in 3 ways, for example, as 8982009 + 56190016 = 2997^2 + 7496^2 .

It is not a de Polignac number, because 65172025 - 2³ = 65172017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65171984 and 65172002.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1303416 + ... + 1303465.

Almost surely, 2^65172025 is an apocalyptic number.

It is an amenable number.

65172025 is a deficient number, since it is larger than the sum of its proper divisors (15641317).

65172025 is a wasteful number, since it uses less digits than its factorization.

65172025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606891 (or 2606886 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 65172025 is about 8072.9192365587. The cubic root of 65172025 is about 402.4269635877.

The spelling of 65172025 in words is "sixty-five million, one hundred seventy-two thousand, twenty-five".