1497972321 has 12 divisors (see below), whose sum is σ = 2165125248. Its totient is φ = 998007864.

The previous prime is 1497972257. The next prime is 1497972341. The reversal of 1497972321 is 1232797941.

It is not a de Polignac number, because 1497972321 - 2⁶ = 1497972257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1497972341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38325 + ... + 66818.

It is an arithmetic number, because the mean of its divisors is an integer number (180427104).

Almost surely, 2^1497972321 is an apocalyptic number.

It is an amenable number.

1497972321 is a deficient number, since it is larger than the sum of its proper divisors (667152927).

1497972321 is a wasteful number, since it uses less digits than its factorization.

1497972321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106732 (or 106729 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 1497972321 is about 38703.6473862606. The cubic root of 1497972321 is about 1144.1982070646.

The spelling of 1497972321 in words is "one billion, four hundred ninety-seven million, nine hundred seventy-two thousand, three hundred twenty-one".