65121025 has 12 divisors (see below), whose sum is σ = 80883712. Its totient is φ = 52010640.

The previous prime is 65120969. The next prime is 65121031. The reversal of 65121025 is 52012156.

It is not a de Polignac number, because 65121025 - 2¹³ = 65112833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65120987 and 65121005.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16384 + ... + 19966.

Almost surely, 2^65121025 is an apocalyptic number.

It is an amenable number.

65121025 is a deficient number, since it is larger than the sum of its proper divisors (15762687).

65121025 is a wasteful number, since it uses less digits than its factorization.

65121025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4320 (or 4315 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 65121025 is about 8069.7599096875. The cubic root of 65121025 is about 402.3219638783.

The spelling of 65121025 in words is "sixty-five million, one hundred twenty-one thousand, twenty-five".