61139275 has 6 divisors (see below), whose sum is σ = 75812732. Its totient is φ = 48911400.

The previous prime is 61139269. The next prime is 61139297. The reversal of 61139275 is 57293116.

It is not a de Polignac number, because 61139275 - 2¹¹ = 61137227 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 61139275.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1222761 + ... + 1222810.

Almost surely, 2^61139275 is an apocalyptic number.

61139275 is a deficient number, since it is larger than the sum of its proper divisors (14673457).

61139275 is a wasteful number, since it uses less digits than its factorization.

61139275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445581 (or 2445576 counting only the distinct ones).

The product of its digits is 11340, while the sum is 34.

The square root of 61139275 is about 7819.1607605932. The cubic root of 61139275 is about 393.9490838376.

The spelling of 61139275 in words is "sixty-one million, one hundred thirty-nine thousand, two hundred seventy-five".