139240265 has 16 divisors (see below), whose sum is σ = 178118400. Its totient is φ = 104188032.

The previous prime is 139240237. The next prime is 139240267. The reversal of 139240265 is 562042931.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 139240265 - 2⁶ = 139240201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139240267) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1772 + ... + 16781.

It is an arithmetic number, because the mean of its divisors is an integer number (11132400).

Almost surely, 2^139240265 is an apocalyptic number.

It is an amenable number.

139240265 is a deficient number, since it is larger than the sum of its proper divisors (38878135).

139240265 is a wasteful number, since it uses less digits than its factorization.

139240265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18656.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 139240265 is about 11800.0112288082. The cubic root of 139240265 is about 518.3084394625.

The spelling of 139240265 in words is "one hundred thirty-nine million, two hundred forty thousand, two hundred sixty-five".