1321421000 has 32 divisors (see below), whose sum is σ = 3092127480. Its totient is φ = 528568000.

The previous prime is 1321420993. The next prime is 1321421011. The reversal of 1321421000 is 1241231.

It can be written as a sum of positive squares in 4 ways, for example, as 654438724 + 666982276 = 25582^2 + 25826^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659711 + ... + 661710.

Almost surely, 2^1321421000 is an apocalyptic number.

1321421000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321421000 is an abundant number, since it is smaller than the sum of its proper divisors (1770706480).

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

1321421000 is a wasteful number, since it uses less digits than its factorization.

1321421000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321442 (or 1321428 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1321421000 is about 36351.3548578316. The cubic root of 1321421000 is about 1097.3548011445.

Adding to 1321421000 its reverse (1241231), we get a palindrome (1322662231).

The spelling of 1321421000 in words is "one billion, three hundred twenty-one million, four hundred twenty-one thousand".