8139425 has 12 divisors (see below), whose sum is σ = 11534976. Its totient is φ = 5581200.

The previous prime is 8139421. The next prime is 8139431. The reversal of 8139425 is 5249318.

It is not a de Polignac number, because 8139425 - 2² = 8139421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8139391 and 8139400.

It is not an unprimeable number, because it can be changed into a prime (8139421) 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 11 ways as a sum of consecutive naturals, for example, 23081 + ... + 23430.

It is an arithmetic number, because the mean of its divisors is an integer number (961248).

Almost surely, 2^8139425 is an apocalyptic number.

It is an amenable number.

8139425 is a deficient number, since it is larger than the sum of its proper divisors (3395551).

8139425 is a wasteful number, since it uses less digits than its factorization.

8139425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46528 (or 46523 counting only the distinct ones).

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

The square root of 8139425 is about 2852.9677530600. The cubic root of 8139425 is about 201.1551898359.

The spelling of 8139425 in words is "eight million, one hundred thirty-nine thousand, four hundred twenty-five".