1521425472 has 168 divisors, whose sum is σ = 4888284864. Its totient is φ = 409018368.

The previous prime is 1521425449. The next prime is 1521425509. The reversal of 1521425472 is 2745241251.

It is a tau number, because it is divible by the number of its divisors (168).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 386458 + ... + 390374.

Almost surely, 2^1521425472 is an apocalyptic number.

1521425472 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 1521425472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2444142432).

1521425472 is an abundant number, since it is smaller than the sum of its proper divisors (3366859392).

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

1521425472 is a wasteful number, since it uses less digits than its factorization.

1521425472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973 (or 3946 counting only the distinct ones).

The product of its digits is 22400, while the sum is 33.

The square root of 1521425472 is about 39005.4543878161. The cubic root of 1521425472 is about 1150.1387285696.

The spelling of 1521425472 in words is "one billion, five hundred twenty-one million, four hundred twenty-five thousand, four hundred seventy-two".