139401253 has 4 divisors (see below), whose sum is σ = 139563648. Its totient is φ = 139238860.

The previous prime is 139401221. The next prime is 139401259. The reversal of 139401253 is 352104931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139401253 - 2⁵ = 139401221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139401259) 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 3 ways as a sum of consecutive naturals, for example, 79903 + ... + 81628.

It is an arithmetic number, because the mean of its divisors is an integer number (34890912).

Almost surely, 2^139401253 is an apocalyptic number.

It is an amenable number.

139401253 is a deficient number, since it is larger than the sum of its proper divisors (162395).

139401253 is an equidigital number, since it uses as much as digits as its factorization.

139401253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162394.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 139401253 is about 11806.8307771391. The cubic root of 139401253 is about 518.5081166217.

The spelling of 139401253 in words is "one hundred thirty-nine million, four hundred one thousand, two hundred fifty-three".