65212125 has 32 divisors (see below), whose sum is σ = 118385280. Its totient is φ = 31616000.

The previous prime is 65212117. The next prime is 65212159. The reversal of 65212125 is 52121256.

It is a happy number.

It is not a de Polignac number, because 65212125 - 2³ = 65212117 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 65212095 and 65212104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3780 + ... + 12029.

It is an arithmetic number, because the mean of its divisors is an integer number (3699540).

Almost surely, 2^65212125 is an apocalyptic number.

It is an amenable number.

65212125 is a deficient number, since it is larger than the sum of its proper divisors (53173155).

65212125 is a wasteful number, since it uses less digits than its factorization.

65212125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15838 (or 15828 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 65212125 is about 8075.4024667505. The cubic root of 65212125 is about 402.5094837213.

It can be divided in two parts, 6521 and 2125, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 65212125 in words is "sixty-five million, two hundred twelve thousand, one hundred twenty-five".