61125138 has 32 divisors (see below), whose sum is σ = 136454400. Its totient is φ = 20281968.

The previous prime is 61125133. The next prime is 61125143. The reversal of 61125138 is 83152116.

It is an interprime number because it is at equal distance from previous prime (61125133) and next prime (61125143).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (61125131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9895 + ... + 14837.

It is an arithmetic number, because the mean of its divisors is an integer number (4264200).

Almost surely, 2^61125138 is an apocalyptic number.

61125138 is an abundant number, since it is smaller than the sum of its proper divisors (75329262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61125138 is a wasteful number, since it uses less digits than its factorization.

61125138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183 (or 5177 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 61125138 is about 7818.2567110578. The cubic root of 61125138 is about 393.9187177186.

The spelling of 61125138 in words is "sixty-one million, one hundred twenty-five thousand, one hundred thirty-eight".