1521320252 has 24 divisors (see below), whose sum is σ = 2785285440. Its totient is φ = 726314240.

The previous prime is 1521320249. The next prime is 1521320351. The reversal of 1521320252 is 2520231251.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90977 + ... + 106392.

It is an arithmetic number, because the mean of its divisors is an integer number (116053560).

Almost surely, 2^1521320252 is an apocalyptic number.

It is an amenable number.

1521320252 is a deficient number, since it is larger than the sum of its proper divisors (1263965188).

1521320252 is a wasteful number, since it uses less digits than its factorization.

1521320252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197461 (or 197459 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1521320252 is about 39004.1055787721. The cubic root of 1521320252 is about 1150.1122138768.

The spelling of 1521320252 in words is "one billion, five hundred twenty-one million, three hundred twenty thousand, two hundred fifty-two".