1321442072 has 64 divisors (see below), whose sum is σ = 2623276800. Its totient is φ = 623145600.

The previous prime is 1321442071. The next prime is 1321442099. The reversal of 1321442072 is 2702441231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321442071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2346863 + ... + 2347425.

It is an arithmetic number, because the mean of its divisors is an integer number (40988700).

Almost surely, 2^1321442072 is an apocalyptic number.

It is an amenable number.

1321442072 is a deficient number, since it is larger than the sum of its proper divisors (1301834728).

1321442072 is a wasteful number, since it uses less digits than its factorization.

1321442072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 1321442072 is about 36351.6446945664. The cubic root of 1321442072 is about 1097.3606340919.

The spelling of 1321442072 in words is "one billion, three hundred twenty-one million, four hundred forty-two thousand, seventy-two".