651251265 has 16 divisors (see below), whose sum is σ = 1190859648. Its totient is φ = 297714816.

The previous prime is 651251219. The next prime is 651251267. The reversal of 651251265 is 562152156.

It is not a de Polignac number, because 651251265 - 2¹⁷ = 651120193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (651251267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3101092 + ... + 3101301.

It is an arithmetic number, because the mean of its divisors is an integer number (74428728).

Almost surely, 2^651251265 is an apocalyptic number.

It is an amenable number.

651251265 is a deficient number, since it is larger than the sum of its proper divisors (539608383).

651251265 is a wasteful number, since it uses less digits than its factorization.

651251265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6202408.

The product of its digits is 18000, while the sum is 33.

The square root of 651251265 is about 25519.6250952086. The cubic root of 651251265 is about 866.7945924740.

The spelling of 651251265 in words is "six hundred fifty-one million, two hundred fifty-one thousand, two hundred sixty-five".