139254992 has 20 divisors (see below), whose sum is σ = 271934976. Its totient is φ = 69078240.

The previous prime is 139254991. The next prime is 139255001. The reversal of 139254992 is 299452931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139254991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32234 + ... + 36297.

Almost surely, 2^139254992 is an apocalyptic number.

It is an amenable number.

139254992 is a deficient number, since it is larger than the sum of its proper divisors (132679984).

139254992 is a wasteful number, since it uses less digits than its factorization.

139254992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68666 (or 68660 counting only the distinct ones).

The product of its digits is 174960, while the sum is 44.

The square root of 139254992 is about 11800.6352371387. The cubic root of 139254992 is about 518.3267120967.

The spelling of 139254992 in words is "one hundred thirty-nine million, two hundred fifty-four thousand, nine hundred ninety-two".