8425139 has 4 divisors (see below), whose sum is σ = 8462160. Its totient is φ = 8388120.

The previous prime is 8425133. The next prime is 8425169. The reversal of 8425139 is 9315248.

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

It is a cyclic number.

It is not a de Polignac number, because 8425139 - 2⁸ = 8424883 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8425133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18167 + ... + 18624.

It is an arithmetic number, because the mean of its divisors is an integer number (2115540).

Almost surely, 2^8425139 is an apocalyptic number.

8425139 is a deficient number, since it is larger than the sum of its proper divisors (37021).

8425139 is a wasteful number, since it uses less digits than its factorization.

8425139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37020.

The product of its digits is 8640, while the sum is 32.

The square root of 8425139 is about 2902.6089988147. The cubic root of 8425139 is about 203.4818566088.

The spelling of 8425139 in words is "eight million, four hundred twenty-five thousand, one hundred thirty-nine".