139081512 has 64 divisors (see below), whose sum is σ = 358162560. Its totient is φ = 44979200.

The previous prime is 139081511. The next prime is 139081559. The reversal of 139081512 is 215180931.

It is a super-2 number, since 2×139081512² = 38687333960412288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139081512.

It is not an unprimeable number, because it can be changed into a prime (139081511) 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, 276253 + ... + 276755.

It is an arithmetic number, because the mean of its divisors is an integer number (5596290).

Almost surely, 2^139081512 is an apocalyptic number.

139081512 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 139081512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179081280).

139081512 is an abundant number, since it is smaller than the sum of its proper divisors (219081048).

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

139081512 is a wasteful number, since it uses less digits than its factorization.

139081512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834 (or 830 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 139081512 is about 11793.2824947086. The cubic root of 139081512 is about 518.1113836496. Note that the first 3 decimals are identical.

The spelling of 139081512 in words is "one hundred thirty-nine million, eighty-one thousand, five hundred twelve".