251264061 has 12 divisors (see below), whose sum is σ = 363074400. Its totient is φ = 167445960.

The previous prime is 251264059. The next prime is 251264087. The reversal of 251264061 is 160462152.

251264061 is a `hidden beast` number, since 2 + 5 + 12 + 640 + 6 + 1 = 666.

It is not a de Polignac number, because 251264061 - 2¹ = 251264059 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251264051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43840 + ... + 49238.

It is an arithmetic number, because the mean of its divisors is an integer number (30256200).

Almost surely, 2^251264061 is an apocalyptic number.

It is an amenable number.

251264061 is a deficient number, since it is larger than the sum of its proper divisors (111810339).

251264061 is a wasteful number, since it uses less digits than its factorization.

251264061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10576 (or 10573 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 251264061 is about 15851.3110183354. The cubic root of 251264061 is about 631.0204851853.

The spelling of 251264061 in words is "two hundred fifty-one million, two hundred sixty-four thousand, sixty-one".