139745825 has 6 divisors (see below), whose sum is σ = 173284854. Its totient is φ = 111796640.

The previous prime is 139745783. The next prime is 139745833. The reversal of 139745825 is 528547931.

It can be written as a sum of positive squares in 3 ways, for example, as 35236096 + 104509729 = 5936^2 + 10223^2 .

It is not a de Polignac number, because 139745825 - 2⁶ = 139745761 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2794892 + ... + 2794941.

It is an arithmetic number, because the mean of its divisors is an integer number (28880809).

Almost surely, 2^139745825 is an apocalyptic number.

It is an amenable number.

139745825 is a deficient number, since it is larger than the sum of its proper divisors (33539029).

139745825 is an equidigital number, since it uses as much as digits as its factorization.

139745825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5589843 (or 5589838 counting only the distinct ones).

The product of its digits is 302400, while the sum is 44.

The square root of 139745825 is about 11821.4138325329. The cubic root of 139745825 is about 518.9349812063.

The spelling of 139745825 in words is "one hundred thirty-nine million, seven hundred forty-five thousand, eight hundred twenty-five".