1539421172 has 12 divisors (see below), whose sum is σ = 2694365856. Its totient is φ = 769602360.

The previous prime is 1539421171. The next prime is 1539421183. The reversal of 1539421172 is 2711249351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1539421171) 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, 10847 + ... + 56537.

It is an arithmetic number, because the mean of its divisors is an integer number (224530488).

Almost surely, 2^1539421172 is an apocalyptic number.

It is an amenable number.

1539421172 is a deficient number, since it is larger than the sum of its proper divisors (1154944684).

1539421172 is a wasteful number, since it uses less digits than its factorization.

1539421172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54118 (or 54116 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 1539421172 is about 39235.4580959621. The cubic root of 1539421172 is about 1154.6556501745.

The spelling of 1539421172 in words is "one billion, five hundred thirty-nine million, four hundred twenty-one thousand, one hundred seventy-two".