1456643521 has 12 divisors (see below), whose sum is σ = 1614652992. Its totient is φ = 1311345728.

The previous prime is 1456643501. The next prime is 1456643549. The reversal of 1456643521 is 1253466541.

It is not a de Polignac number, because 1456643521 - 2⁹ = 1456643009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1456643501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102925 + ... + 116218.

It is an arithmetic number, because the mean of its divisors is an integer number (134554416).

Almost surely, 2^1456643521 is an apocalyptic number.

It is an amenable number.

1456643521 is a deficient number, since it is larger than the sum of its proper divisors (158009471).

1456643521 is a wasteful number, since it uses less digits than its factorization.

1456643521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219200 (or 219183 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 1456643521 is about 38165.9995414767. Note that the first 3 decimals coincide. The cubic root of 1456643521 is about 1133.5771780869.

The spelling of 1456643521 in words is "one billion, four hundred fifty-six million, six hundred forty-three thousand, five hundred twenty-one".