138242534 has 8 divisors (see below), whose sum is σ = 207703920. Its totient is φ = 69007896.

The previous prime is 138242519. The next prime is 138242561. The reversal of 138242534 is 435242831.

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

It is a super-2 number, since 2×138242534² = 38221996413482312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138242534.

It is a congruent number.

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, 55154 + ... + 57605.

It is an arithmetic number, because the mean of its divisors is an integer number (25962990).

Almost surely, 2^138242534 is an apocalyptic number.

138242534 is a deficient number, since it is larger than the sum of its proper divisors (69461386).

138242534 is a wasteful number, since it uses less digits than its factorization.

138242534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113374.

The product of its digits is 23040, while the sum is 32.

The square root of 138242534 is about 11757.6585254038. The cubic root of 138242534 is about 517.0674849272.

The spelling of 138242534 in words is "one hundred thirty-eight million, two hundred forty-two thousand, five hundred thirty-four".