139224865 has 24 divisors (see below), whose sum is σ = 188130600. Its totient is φ = 98317824.

The previous prime is 139224851. The next prime is 139224881. The reversal of 139224865 is 568422931.

It can be written as a sum of positive squares in 4 ways, for example, as 8464 + 139216401 = 92^2 + 11799^2 .

It is not a de Polignac number, because 139224865 - 2¹⁷ = 139093793 is a prime.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 32361 + ... + 36409.

It is an arithmetic number, because the mean of its divisors is an integer number (7838775).

Almost surely, 2^139224865 is an apocalyptic number.

It is an amenable number.

139224865 is a deficient number, since it is larger than the sum of its proper divisors (48905735).

139224865 is a wasteful number, since it uses less digits than its factorization.

139224865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113 (or 4090 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 139224865 is about 11799.3586690125. The cubic root of 139224865 is about 518.2893304204.

The spelling of 139224865 in words is "one hundred thirty-nine million, two hundred twenty-four thousand, eight hundred sixty-five".