139442524 has 24 divisors (see below), whose sum is σ = 263351088. Its totient is φ = 64222080.

The previous prime is 139442497. The next prime is 139442531. The reversal of 139442524 is 425244931.

It is a self number, because there is not a number n which added to its sum of digits gives 139442524.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24519 + ... + 29665.

It is an arithmetic number, because the mean of its divisors is an integer number (10972962).

Almost surely, 2^139442524 is an apocalyptic number.

It is an amenable number.

139442524 is a deficient number, since it is larger than the sum of its proper divisors (123908564).

139442524 is a wasteful number, since it uses less digits than its factorization.

139442524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5685 (or 5683 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 139442524 is about 11808.5784072428. The cubic root of 139442524 is about 518.5592812431.

The spelling of 139442524 in words is "one hundred thirty-nine million, four hundred forty-two thousand, five hundred twenty-four".