1421220992 has 32 divisors (see below), whose sum is σ = 2838501900. Its totient is φ = 708812800.

The previous prime is 1421220959. The next prime is 1421221057. The reversal of 1421220992 is 2990221241.

It can be written as a sum of positive squares in 2 ways, for example, as 1409551936 + 11669056 = 37544^2 + 3416^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 37484 + ... + 65172.

Almost surely, 2^1421220992 is an apocalyptic number.

It is an amenable number.

1421220992 is a deficient number, since it is larger than the sum of its proper divisors (1417280908).

1421220992 is an equidigital number, since it uses as much as digits as its factorization.

1421220992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28104 (or 28092 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1421220992 is about 37699.0847634263. The cubic root of 1421220992 is about 1124.3129281569.

The spelling of 1421220992 in words is "one billion, four hundred twenty-one million, two hundred twenty thousand, nine hundred ninety-two".