108138425 has 6 divisors (see below), whose sum is σ = 134091678. Its totient is φ = 86510720.

The previous prime is 108138409. The next prime is 108138427. The reversal of 108138425 is 524831801.

It can be written as a sum of positive squares in 3 ways, for example, as 6310144 + 101828281 = 2512^2 + 10091^2 .

It is not a de Polignac number, because 108138425 - 2⁴ = 108138409 is a prime.

It is a super-2 number, since 2×108138425² = 23387837922961250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 108138391 and 108138400.

It is not an unprimeable number, because it can be changed into a prime (108138427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2162744 + ... + 2162793.

It is an arithmetic number, because the mean of its divisors is an integer number (22348613).

Almost surely, 2^108138425 is an apocalyptic number.

It is an amenable number.

108138425 is a deficient number, since it is larger than the sum of its proper divisors (25953253).

108138425 is an equidigital number, since it uses as much as digits as its factorization.

108138425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325547 (or 4325542 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 108138425 is about 10398.9626886531. The cubic root of 108138425 is about 476.4236879774.

The spelling of 108138425 in words is "one hundred eight million, one hundred thirty-eight thousand, four hundred twenty-five".