139605492 has 144 divisors (see below), whose sum is σ = 382209408. Its totient is φ = 39536640.

The previous prime is 139605491. The next prime is 139605497. The reversal of 139605492 is 294506931.

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 139605492.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139605491) 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 47 ways as a sum of consecutive naturals, for example, 1912368 + ... + 1912440.

It is an arithmetic number, because the mean of its divisors is an integer number (2654232).

Almost surely, 2^139605492 is an apocalyptic number.

139605492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139605492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191104704).

139605492 is an abundant number, since it is smaller than the sum of its proper divisors (242603916).

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

139605492 is a wasteful number, since it uses less digits than its factorization.

139605492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 139605492 is about 11815.4767995202. The cubic root of 139605492 is about 518.7612178926.

The spelling of 139605492 in words is "one hundred thirty-nine million, six hundred five thousand, four hundred ninety-two".