139279442 has 8 divisors (see below), whose sum is σ = 212861196. Its totient is φ = 68325712.

The previous prime is 139279429. The next prime is 139279457. The reversal of 139279442 is 244972931.

It can be written as a sum of positive squares in 2 ways, for example, as 133379401 + 5900041 = 11549^2 + 2429^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 139279442.

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, 656873 + ... + 657084.

Almost surely, 2^139279442 is an apocalyptic number.

139279442 is a deficient number, since it is larger than the sum of its proper divisors (73581754).

139279442 is a wasteful number, since it uses less digits than its factorization.

139279442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314012.

The product of its digits is 108864, while the sum is 41.

The square root of 139279442 is about 11801.6711528495. The cubic root of 139279442 is about 518.3570457705.

The spelling of 139279442 in words is "one hundred thirty-nine million, two hundred seventy-nine thousand, four hundred forty-two".