139254565 has 16 divisors (see below), whose sum is σ = 177230592. Its totient is φ = 104675584.

The previous prime is 139254541. The next prime is 139254571. The reversal of 139254565 is 565452931.

It is a cyclic number.

It is not a de Polignac number, because 139254565 - 2¹¹ = 139252517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74472 + ... + 76318.

It is an arithmetic number, because the mean of its divisors is an integer number (11076912).

Almost surely, 2^139254565 is an apocalyptic number.

It is an amenable number.

139254565 is a deficient number, since it is larger than the sum of its proper divisors (37976027).

139254565 is a wasteful number, since it uses less digits than its factorization.

139254565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756.

The product of its digits is 162000, while the sum is 40.

The square root of 139254565 is about 11800.6171448785. The cubic root of 139254565 is about 518.3261823115.

The spelling of 139254565 in words is "one hundred thirty-nine million, two hundred fifty-four thousand, five hundred sixty-five".