1321472391 has 8 divisors (see below), whose sum is σ = 1762132224. Its totient is φ = 880897080.

The previous prime is 1321472359. The next prime is 1321472393. The reversal of 1321472391 is 1932741231.

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

It is not a de Polignac number, because 1321472391 - 2⁵ = 1321472359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321472393) by changing a digit.

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, 44290 + ... + 67856.

It is an arithmetic number, because the mean of its divisors is an integer number (220266528).

Almost surely, 2^1321472391 is an apocalyptic number.

1321472391 is a deficient number, since it is larger than the sum of its proper divisors (440659833).

1321472391 is a wasteful number, since it uses less digits than its factorization.

1321472391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42261.

The product of its digits is 9072, while the sum is 33.

The square root of 1321472391 is about 36352.0617159467. The cubic root of 1321472391 is about 1097.3690265956.

The spelling of 1321472391 in words is "one billion, three hundred twenty-one million, four hundred seventy-two thousand, three hundred ninety-one".