138042275 has 12 divisors (see below), whose sum is σ = 195625872. Its totient is φ = 94657440.

The previous prime is 138042271. The next prime is 138042313. The reversal of 138042275 is 572240831.

138042275 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138042275 - 2² = 138042271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138042271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394232 + ... + 394581.

It is an arithmetic number, because the mean of its divisors is an integer number (16302156).

Almost surely, 2^138042275 is an apocalyptic number.

138042275 is a deficient number, since it is larger than the sum of its proper divisors (57583597).

138042275 is an equidigital number, since it uses as much as digits as its factorization.

138042275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788830 (or 788825 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 138042275 is about 11749.1393301807. The cubic root of 138042275 is about 516.8176885378.

The spelling of 138042275 in words is "one hundred thirty-eight million, forty-two thousand, two hundred seventy-five".