139164225 has 12 divisors (see below), whose sum is σ = 230084976. Its totient is φ = 74220880.

The previous prime is 139164217. The next prime is 139164229. The reversal of 139164225 is 522461931.

It is not a de Polignac number, because 139164225 - 2³ = 139164217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139164229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 927687 + ... + 927836.

It is an arithmetic number, because the mean of its divisors is an integer number (19173748).

Almost surely, 2^139164225 is an apocalyptic number.

139164225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139164225 is a deficient number, since it is larger than the sum of its proper divisors (90920751).

139164225 is a wasteful number, since it uses less digits than its factorization.

139164225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855536 (or 1855531 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 139164225 is about 11796.7887579629. The cubic root of 139164225 is about 518.2140717633.

The spelling of 139164225 in words is "one hundred thirty-nine million, one hundred sixty-four thousand, two hundred twenty-five".