139242902 has 4 divisors (see below), whose sum is σ = 208864356. Its totient is φ = 69621450.

The previous prime is 139242899. The next prime is 139242907. The reversal of 139242902 is 209242931.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139242907) by changing a digit.

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 as a sum of consecutive naturals, namely, 34810724 + ... + 34810727.

It is an arithmetic number, because the mean of its divisors is an integer number (52216089).

Almost surely, 2^139242902 is an apocalyptic number.

139242902 is a deficient number, since it is larger than the sum of its proper divisors (69621454).

139242902 is an equidigital number, since it uses as much as digits as its factorization.

139242902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69621453.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 139242902 is about 11800.1229654610. The cubic root of 139242902 is about 518.3117114345.

The spelling of 139242902 in words is "one hundred thirty-nine million, two hundred forty-two thousand, nine hundred two".