139637042 has 16 divisors (see below), whose sum is σ = 223140960. Its totient is φ = 65345472.

The previous prime is 139637041. The next prime is 139637063. The reversal of 139637042 is 240736931.

It is a junction number, because it is equal to n+sod(n) for n = 139636993 and 139637011.

It is not an unprimeable number, because it can be changed into a prime (139637041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18983 + ... + 25290.

It is an arithmetic number, because the mean of its divisors is an integer number (13946310).

Almost surely, 2^139637042 is an apocalyptic number.

139637042 is a deficient number, since it is larger than the sum of its proper divisors (83503918).

139637042 is a wasteful number, since it uses less digits than its factorization.

139637042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44377.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 139637042 is about 11816.8118373781. The cubic root of 139637042 is about 518.8002939189.

The spelling of 139637042 in words is "one hundred thirty-nine million, six hundred thirty-seven thousand, forty-two".