139542658 has 8 divisors (see below), whose sum is σ = 209478780. Its totient is φ = 69716400.

The previous prime is 139542653. The next prime is 139542661. The reversal of 139542658 is 856245931.

It can be written as a sum of positive squares in 2 ways, for example, as 138227049 + 1315609 = 11757^2 + 1147^2 .

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

It is not an unprimeable number, because it can be changed into a prime (139542653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24213 + ... + 29416.

Almost surely, 2^139542658 is an apocalyptic number.

139542658 is a deficient number, since it is larger than the sum of its proper divisors (69936122).

139542658 is a wasteful number, since it uses less digits than its factorization.

139542658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54932.

The product of its digits is 259200, while the sum is 43.

The square root of 139542658 is about 11812.8175301238. The cubic root of 139542658 is about 518.6833777508.

The spelling of 139542658 in words is "one hundred thirty-nine million, five hundred forty-two thousand, six hundred fifty-eight".