1321633434 has 16 divisors (see below), whose sum is σ = 2883564000. Its totient is φ = 400494960.

The previous prime is 1321633409. The next prime is 1321633441. The reversal of 1321633434 is 4343361231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10012309 + ... + 10012440.

It is an arithmetic number, because the mean of its divisors is an integer number (180222750).

Almost surely, 2^1321633434 is an apocalyptic number.

1321633434 is an abundant number, since it is smaller than the sum of its proper divisors (1561930566).

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

1321633434 is a wasteful number, since it uses less digits than its factorization.

1321633434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20024765.

The product of its digits is 15552, while the sum is 30.

The square root of 1321633434 is about 36354.2766947714. The cubic root of 1321633434 is about 1097.4136022329.

Adding to 1321633434 its reverse (4343361231), we get a palindrome (5664994665).

The spelling of 1321633434 in words is "one billion, three hundred twenty-one million, six hundred thirty-three thousand, four hundred thirty-four".