139265765 has 4 divisors (see below), whose sum is σ = 167118924. Its totient is φ = 111412608.

The previous prime is 139265729. The next prime is 139265771. The reversal of 139265765 is 567562931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57851236 + 81414529 = 7606^2 + 9023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139265765 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13926572 + ... + 13926581.

It is an arithmetic number, because the mean of its divisors is an integer number (41779731).

Almost surely, 2^139265765 is an apocalyptic number.

It is an amenable number.

139265765 is a deficient number, since it is larger than the sum of its proper divisors (27853159).

139265765 is an equidigital number, since it uses as much as digits as its factorization.

139265765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27853158.

The product of its digits is 340200, while the sum is 44.

The square root of 139265765 is about 11801.0916867890. The cubic root of 139265765 is about 518.3400779603.

It can be divided in two parts, 13926 and 5765, that added together give a palindrome (19691).

The spelling of 139265765 in words is "one hundred thirty-nine million, two hundred sixty-five thousand, seven hundred sixty-five".