139981512 has 192 divisors, whose sum is σ = 421344000. Its totient is φ = 38586240.

The previous prime is 139981511. The next prime is 139981537. The reversal of 139981512 is 215189931.

139981512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×139981512² = 39189647403612288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139981511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2372539 + ... + 2372597.

It is an arithmetic number, because the mean of its divisors is an integer number (2194500).

Almost surely, 2^139981512 is an apocalyptic number.

139981512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139981512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210672000).

139981512 is an abundant number, since it is smaller than the sum of its proper divisors (281362488).

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

139981512 is a wasteful number, since it uses less digits than its factorization.

139981512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 137 counting only the distinct ones).

The product of its digits is 19440, while the sum is 39.

The square root of 139981512 is about 11831.3782798117. The cubic root of 139981512 is about 519.2265523144.

The spelling of 139981512 in words is "one hundred thirty-nine million, nine hundred eighty-one thousand, five hundred twelve".