139915542 has 32 divisors (see below), whose sum is σ = 319086432. Its totient is φ = 40518144.

The previous prime is 139915541. The next prime is 139915547. The reversal of 139915542 is 245519931.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 139915542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139915541) 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 in 15 ways as a sum of consecutive naturals, for example, 51433 + ... + 54084.

It is an arithmetic number, because the mean of its divisors is an integer number (9971451).

Almost surely, 2^139915542 is an apocalyptic number.

139915542 is an abundant number, since it is smaller than the sum of its proper divisors (179170890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139915542 is a wasteful number, since it uses less digits than its factorization.

139915542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105552.

The product of its digits is 48600, while the sum is 39.

The square root of 139915542 is about 11828.5900258653. The cubic root of 139915542 is about 519.1449730698.

The spelling of 139915542 in words is "one hundred thirty-nine million, nine hundred fifteen thousand, five hundred forty-two".