1321404442 has 8 divisors (see below), whose sum is σ = 1982300256. Its totient is φ = 660637692.

The previous prime is 1321404431. The next prime is 1321404499. The reversal of 1321404442 is 2444041231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1321404442² = 3492219398674662728, which contains 22 as substring.

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, 358 + ... + 51409.

It is an arithmetic number, because the mean of its divisors is an integer number (247787532).

Almost surely, 2^1321404442 is an apocalyptic number.

1321404442 is a deficient number, since it is larger than the sum of its proper divisors (660895814).

1321404442 is a wasteful number, since it uses less digits than its factorization.

1321404442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64532.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1321404442 is about 36351.1271076978. The cubic root of 1321404442 is about 1097.3502176755.

Adding to 1321404442 its reverse (2444041231), we get a palindrome (3765445673).

The spelling of 1321404442 in words is "one billion, three hundred twenty-one million, four hundred four thousand, four hundred forty-two".