139124481 has 16 divisors (see below), whose sum is σ = 198442944. Its totient is φ = 86390784.

The previous prime is 139124473. The next prime is 139124501. The reversal of 139124481 is 184421931.

It is a happy number.

It is not a de Polignac number, because 139124481 - 2³ = 139124473 is a prime.

It is a super-2 number, since 2×139124481² = 38711242427038722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139124411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9115 + ... + 19008.

It is an arithmetic number, because the mean of its divisors is an integer number (12402684).

Almost surely, 2^139124481 is an apocalyptic number.

It is an amenable number.

139124481 is a deficient number, since it is larger than the sum of its proper divisors (59318463).

139124481 is a wasteful number, since it uses less digits than its factorization.

139124481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28240.

The product of its digits is 6912, while the sum is 33.

The square root of 139124481 is about 11795.1041114523. The cubic root of 139124481 is about 518.1647347036.

The spelling of 139124481 in words is "one hundred thirty-nine million, one hundred twenty-four thousand, four hundred eighty-one".