139394042 has 8 divisors (see below), whose sum is σ = 215836032. Its totient is φ = 67448700.

The previous prime is 139394029. The next prime is 139394063. The reversal of 139394042 is 240493931.

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

It is a junction number, because it is equal to n+sod(n) for n = 139393993 and 139394011.

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, 1124084 + ... + 1124207.

It is an arithmetic number, because the mean of its divisors is an integer number (26979504).

Almost surely, 2^139394042 is an apocalyptic number.

139394042 is a deficient number, since it is larger than the sum of its proper divisors (76441990).

139394042 is a wasteful number, since it uses less digits than its factorization.

139394042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248324.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 139394042 is about 11806.5253991172. The cubic root of 139394042 is about 518.4991759405.

The spelling of 139394042 in words is "one hundred thirty-nine million, three hundred ninety-four thousand, forty-two".