139746424 has 16 divisors (see below), whose sum is σ = 262217520. Its totient is φ = 69821760.

The previous prime is 139746391. The next prime is 139746427. The reversal of 139746424 is 424647931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139746427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6684 + ... + 18004.

It is an arithmetic number, because the mean of its divisors is an integer number (16388595).

Almost surely, 2^139746424 is an apocalyptic number.

It is an amenable number.

139746424 is a deficient number, since it is larger than the sum of its proper divisors (122471096).

139746424 is a wasteful number, since it uses less digits than its factorization.

139746424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12870 (or 12866 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 139746424 is about 11821.4391678848. The cubic root of 139746424 is about 518.9357226515.

The spelling of 139746424 in words is "one hundred thirty-nine million, seven hundred forty-six thousand, four hundred twenty-four".