61257651 has 32 divisors (see below), whose sum is σ = 100950528. Its totient is φ = 32175360.

The previous prime is 61257629. The next prime is 61257659. The reversal of 61257651 is 15675216.

It is not a de Polignac number, because 61257651 - 2⁵ = 61257619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61257659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124516 + ... + 125006.

It is an arithmetic number, because the mean of its divisors is an integer number (3154704).

Almost surely, 2^61257651 is an apocalyptic number.

61257651 is a deficient number, since it is larger than the sum of its proper divisors (39692877).

61257651 is a wasteful number, since it uses less digits than its factorization.

61257651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its digits is 12600, while the sum is 33.

The square root of 61257651 is about 7826.7267104454. The cubic root of 61257651 is about 394.2031706577.

The spelling of 61257651 in words is "sixty-one million, two hundred fifty-seven thousand, six hundred fifty-one".