138527457 has 8 divisors (see below), whose sum is σ = 187834080. Its totient is φ = 90786240.

The previous prime is 138527449. The next prime is 138527489. The reversal of 138527457 is 754725831.

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

It is not a de Polignac number, because 138527457 - 2³ = 138527449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138527447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391144 + ... + 391497.

It is an arithmetic number, because the mean of its divisors is an integer number (23479260).

Almost surely, 2^138527457 is an apocalyptic number.

It is an amenable number.

138527457 is a deficient number, since it is larger than the sum of its proper divisors (49306623).

138527457 is an equidigital number, since it uses as much as digits as its factorization.

138527457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782703.

The product of its digits is 235200, while the sum is 42.

The square root of 138527457 is about 11769.7687742793. The cubic root of 138527457 is about 517.4224729249.

The spelling of 138527457 in words is "one hundred thirty-eight million, five hundred twenty-seven thousand, four hundred fifty-seven".