139996725 has 24 divisors (see below), whose sum is σ = 252504672. Its totient is φ = 67876800.

The previous prime is 139996721. The next prime is 139996739. The reversal of 139996725 is 527699931.

It is a happy number.

It is not a de Polignac number, because 139996725 - 2² = 139996721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139996721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84022 + ... + 85671.

It is an arithmetic number, because the mean of its divisors is an integer number (10521028).

Almost surely, 2^139996725 is an apocalyptic number.

139996725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139996725 is a deficient number, since it is larger than the sum of its proper divisors (112507947).

139996725 is a wasteful number, since it uses less digits than its factorization.

139996725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169717 (or 169712 counting only the distinct ones).

The product of its digits is 918540, while the sum is 51.

The square root of 139996725 is about 11832.0211713807. The cubic root of 139996725 is about 519.2453612444.

The spelling of 139996725 in words is "one hundred thirty-nine million, nine hundred ninety-six thousand, seven hundred twenty-five".