1021954572 has 18 divisors (see below), whose sum is σ = 2583274148. Its totient is φ = 340651512.

The previous prime is 1021954559. The next prime is 1021954573. The reversal of 1021954572 is 2754591201.

1021954572 is a `hidden beast` number, since 10 + 2 + 195 + 457 + 2 = 666.

1021954572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1021954572² = 2088782294463406368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 28387627 = 1021954572 / (1 + 0 + 2 + 1 + 9 + 5 + 4 + 5 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (1021954573) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14193778 + ... + 14193849.

Almost surely, 2^1021954572 is an apocalyptic number.

1021954572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021954572 is an abundant number, since it is smaller than the sum of its proper divisors (1561319576).

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

1021954572 is a wasteful number, since it uses less digits than its factorization.

1021954572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28387637 (or 28387632 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 1021954572 is about 31968.0242117025. The cubic root of 1021954572 is about 1007.2652785633.

The spelling of 1021954572 in words is "one billion, twenty-one million, nine hundred fifty-four thousand, five hundred seventy-two".