1321472165 has 16 divisors (see below), whose sum is σ = 1709526000. Its totient is φ = 974840832.

The previous prime is 1321472129. The next prime is 1321472197. The reversal of 1321472165 is 5612741231.

It can be written as a sum of positive squares in 8 ways, for example, as 187197124 + 1134275041 = 13682^2 + 33679^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321472165 - 2¹⁸ = 1321210021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55511 + ... + 75659.

It is an arithmetic number, because the mean of its divisors is an integer number (106845375).

Almost surely, 2^1321472165 is an apocalyptic number.

It is an amenable number.

1321472165 is a deficient number, since it is larger than the sum of its proper divisors (388053835).

1321472165 is a wasteful number, since it uses less digits than its factorization.

1321472165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21176.

The product of its digits is 10080, while the sum is 32.

The square root of 1321472165 is about 36352.0586074572. The cubic root of 1321472165 is about 1097.3689640378.

The spelling of 1321472165 in words is "one billion, three hundred twenty-one million, four hundred seventy-two thousand, one hundred sixty-five".