61012251 has 16 divisors (see below), whose sum is σ = 92313600. Its totient is φ = 39808584.

The previous prime is 61012229. The next prime is 61012319. The reversal of 61012251 is 15221016.

61012251 is a `hidden beast` number, since 610 + 1 + 2 + 2 + 51 = 666.

It is not a de Polignac number, because 61012251 - 2⁵ = 61012219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61012051) 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, 22771 + ... + 25308.

It is an arithmetic number, because the mean of its divisors is an integer number (5769600).

Almost surely, 2^61012251 is an apocalyptic number.

61012251 is a deficient number, since it is larger than the sum of its proper divisors (31301349).

61012251 is a wasteful number, since it uses less digits than its factorization.

61012251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48135 (or 48129 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 61012251 is about 7811.0339264402. The cubic root of 61012251 is about 393.6760695664.

Adding to 61012251 its reverse (15221016), we get a palindrome (76233267).

The spelling of 61012251 in words is "sixty-one million, twelve thousand, two hundred fifty-one".