651525121 has 16 divisors (see below), whose sum is σ = 719300736. Its totient is φ = 586325376.

The previous prime is 651525103. The next prime is 651525157. The reversal of 651525121 is 121525156.

It is not a de Polignac number, because 651525121 - 2⁵ = 651525089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 651525121.

It is not an unprimeable number, because it can be changed into a prime (651525101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532116 + ... + 533338.

It is an arithmetic number, because the mean of its divisors is an integer number (44956296).

Almost surely, 2^651525121 is an apocalyptic number.

It is an amenable number.

651525121 is a deficient number, since it is larger than the sum of its proper divisors (67775615).

651525121 is a wasteful number, since it uses less digits than its factorization.

651525121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232.

The product of its digits is 3000, while the sum is 28.

The square root of 651525121 is about 25524.9901273242. The cubic root of 651525121 is about 866.9160733051.

The spelling of 651525121 in words is "six hundred fifty-one million, five hundred twenty-five thousand, one hundred twenty-one".