138425242 has 8 divisors (see below), whose sum is σ = 210139776. Its totient is φ = 68378652.

The previous prime is 138425239. The next prime is 138425257. The reversal of 138425242 is 242524831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416778 + ... + 417109.

It is an arithmetic number, because the mean of its divisors is an integer number (26267472).

Almost surely, 2^138425242 is an apocalyptic number.

138425242 is a deficient number, since it is larger than the sum of its proper divisors (71714534).

138425242 is an equidigital number, since it uses as much as digits as its factorization.

138425242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833972.

The product of its digits is 15360, while the sum is 31.

The square root of 138425242 is about 11765.4257041554. The cubic root of 138425242 is about 517.2951784213.

The spelling of 138425242 in words is "one hundred thirty-eight million, four hundred twenty-five thousand, two hundred forty-two".