139221292 has 12 divisors (see below), whose sum is σ = 278442640. Its totient is φ = 59666256.

The previous prime is 139221263. The next prime is 139221331. The reversal of 139221292 is 292122931.

139221292 is an admirable number.

It is a super-2 number, since 2×139221292² = 38765136292298528, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2486067 + ... + 2486122.

Almost surely, 2^139221292 is an apocalyptic number.

It is an amenable number.

139221292 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

139221292 is a wasteful number, since it uses less digits than its factorization.

139221292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4972200 (or 4972198 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 139221292 is about 11799.2072615070. The cubic root of 139221292 is about 518.2848966731.

The spelling of 139221292 in words is "one hundred thirty-nine million, two hundred twenty-one thousand, two hundred ninety-two".