139492154 has 8 divisors (see below), whose sum is σ = 210300948. Its totient is φ = 69391840.

The previous prime is 139492141. The next prime is 139492163. The reversal of 139492154 is 451294931.

It can be written as a sum of positive squares in 2 ways, for example, as 80586529 + 58905625 = 8977^2 + 7675^2 .

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

It is a super-2 number, since 2×139492154² = 38916122055119432, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176627 + ... + 177414.

Almost surely, 2^139492154 is an apocalyptic number.

139492154 is a deficient number, since it is larger than the sum of its proper divisors (70808794).

139492154 is a wasteful number, since it uses less digits than its factorization.

139492154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354240.

The product of its digits is 38880, while the sum is 38.

The square root of 139492154 is about 11810.6796586818. The cubic root of 139492154 is about 518.6207953439.

The spelling of 139492154 in words is "one hundred thirty-nine million, four hundred ninety-two thousand, one hundred fifty-four".