61025139 has 36 divisors (see below), whose sum is σ = 104036400. Its totient is φ = 34362720.

The previous prime is 61025119. The next prime is 61025183. The reversal of 61025139 is 93152016.

It is not a de Polignac number, because 61025139 - 2⁷ = 61025011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61025119) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30337 + ... + 32285.

It is an arithmetic number, because the mean of its divisors is an integer number (2889900).

Almost surely, 2^61025139 is an apocalyptic number.

61025139 is a deficient number, since it is larger than the sum of its proper divisors (43011261).

61025139 is a wasteful number, since it uses less digits than its factorization.

61025139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040 (or 2030 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 61025139 is about 7811.8588696929. The cubic root of 61025139 is about 393.7037871690.

The spelling of 61025139 in words is "sixty-one million, twenty-five thousand, one hundred thirty-nine".