139071424 has 84 divisors (see below), whose sum is σ = 300059344. Its totient is φ = 63922176.

The previous prime is 139071391. The next prime is 139071461. The reversal of 139071424 is 424170931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1350157 + ... + 1350259.

Almost surely, 2^139071424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139071424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150029672).

139071424 is an abundant number, since it is smaller than the sum of its proper divisors (160987920).

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

139071424 is a wasteful number, since it uses less digits than its factorization.

139071424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 139071424 is about 11792.8547858438. The cubic root of 139071424 is about 518.0988566216.

The spelling of 139071424 in words is "one hundred thirty-nine million, seventy-one thousand, four hundred twenty-four".