139456641 has 8 divisors (see below), whose sum is σ = 186253984. Its totient is φ = 92815200.

The previous prime is 139456607. The next prime is 139456643. The reversal of 139456641 is 146654931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139456641 - 2²¹ = 137359489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139456641.

It is not an unprimeable number, because it can be changed into a prime (139456643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36871 + ... + 40476.

It is an arithmetic number, because the mean of its divisors is an integer number (23281748).

Almost surely, 2^139456641 is an apocalyptic number.

It is an amenable number.

139456641 is a deficient number, since it is larger than the sum of its proper divisors (46797343).

139456641 is an equidigital number, since it uses as much as digits as its factorization.

139456641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77951.

The product of its digits is 77760, while the sum is 39.

The square root of 139456641 is about 11809.1761355312. The cubic root of 139456641 is about 518.5767801001.

The spelling of 139456641 in words is "one hundred thirty-nine million, four hundred fifty-six thousand, six hundred forty-one".