1021663652 has 12 divisors (see below), whose sum is σ = 1845586176. Its totient is φ = 494353320.

The previous prime is 1021663633. The next prime is 1021663673. The reversal of 1021663652 is 2563661201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4119488 + ... + 4119735.

It is an arithmetic number, because the mean of its divisors is an integer number (153798848).

Almost surely, 2^1021663652 is an apocalyptic number.

It is an amenable number.

1021663652 is a deficient number, since it is larger than the sum of its proper divisors (823922524).

1021663652 is a wasteful number, since it uses less digits than its factorization.

1021663652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8239258 (or 8239256 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1021663652 is about 31963.4737161029. The cubic root of 1021663652 is about 1007.1696900269.

The spelling of 1021663652 in words is "one billion, twenty-one million, six hundred sixty-three thousand, six hundred fifty-two".