139211457 has 16 divisors (see below), whose sum is σ = 231416832. Its totient is φ = 72317520.

The previous prime is 139211447. The next prime is 139211467. The reversal of 139211457 is 754112931.

It is an interprime number because it is at equal distance from previous prime (139211447) and next prime (139211467).

It is not a de Polignac number, because 139211457 - 2⁷ = 139211329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (139211417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301093 + ... + 301554.

It is an arithmetic number, because the mean of its divisors is an integer number (14463552).

Almost surely, 2^139211457 is an apocalyptic number.

It is an amenable number.

139211457 is a deficient number, since it is larger than the sum of its proper divisors (92205375).

139211457 is a wasteful number, since it uses less digits than its factorization.

139211457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602668.

The product of its digits is 7560, while the sum is 33.

The square root of 139211457 is about 11798.7904888594. The cubic root of 139211457 is about 518.2726919978.

The spelling of 139211457 in words is "one hundred thirty-nine million, two hundred eleven thousand, four hundred fifty-seven".