139502142 has 64 divisors (see below), whose sum is σ = 351456000. Its totient is φ = 40660704.

The previous prime is 139502141. The next prime is 139502147. The reversal of 139502142 is 241205931.

139502142 is a `hidden beast` number, since 13 + 9 + 502 + 142 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139502141) 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 31 ways as a sum of consecutive naturals, for example, 8109 + ... + 18567.

It is an arithmetic number, because the mean of its divisors is an integer number (5491500).

Almost surely, 2^139502142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139502142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175728000).

139502142 is an abundant number, since it is smaller than the sum of its proper divisors (211953858).

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

139502142 is a wasteful number, since it uses less digits than its factorization.

139502142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10502 (or 10496 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 139502142 is about 11811.1024887603. The cubic root of 139502142 is about 518.6331732465.

The spelling of 139502142 in words is "one hundred thirty-nine million, five hundred two thousand, one hundred forty-two".