1321450402 has 16 divisors (see below), whose sum is σ = 2026933632. Its totient is φ = 645841840.

The previous prime is 1321450393. The next prime is 1321450421. The reversal of 1321450402 is 2040541231.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68613 + ... + 85735.

It is an arithmetic number, because the mean of its divisors is an integer number (126683352).

Almost surely, 2^1321450402 is an apocalyptic number.

1321450402 is a deficient number, since it is larger than the sum of its proper divisors (705483230).

1321450402 is a wasteful number, since it uses less digits than its factorization.

1321450402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17993.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1321450402 is about 36351.7592696695. The cubic root of 1321450402 is about 1097.3629399049.

Adding to 1321450402 its reverse (2040541231), we get a palindrome (3361991633).

The spelling of 1321450402 in words is "one billion, three hundred twenty-one million, four hundred fifty thousand, four hundred two".