1021651036 has 12 divisors (see below), whose sum is σ = 2043302128. Its totient is φ = 437850432.

The previous prime is 1021651031. The next prime is 1021651039. The reversal of 1021651036 is 6301561201.

1021651036 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

1021651036 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021651036.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021651031) 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, 18243741 + ... + 18243796.

Almost surely, 2^1021651036 is an apocalyptic number.

It is an amenable number.

1021651036 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1021651036 is a wasteful number, since it uses less digits than its factorization.

1021651036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36487548 (or 36487546 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1021651036 is about 31963.2763652289. The cubic root of 1021651036 is about 1007.1655443360.

The spelling of 1021651036 in words is "one billion, twenty-one million, six hundred fifty-one thousand, thirty-six".