139211424 has 72 divisors (see below), whose sum is σ = 431881632. Its totient is φ = 42184320.

The previous prime is 139211417. The next prime is 139211437. The reversal of 139211424 is 424112931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18804 + ... + 25139.

It is an arithmetic number, because the mean of its divisors is an integer number (5998356).

Almost surely, 2^139211424 is an apocalyptic number.

It is an amenable number.

139211424 is an abundant number, since it is smaller than the sum of its proper divisors (292670208).

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

139211424 is a wasteful number, since it uses less digits than its factorization.

139211424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43970 (or 43959 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 139211424 is about 11798.7890904109. The cubic root of 139211424 is about 518.2726510457.

The spelling of 139211424 in words is "one hundred thirty-nine million, two hundred eleven thousand, four hundred twenty-four".