1321472417 has 4 divisors (see below), whose sum is σ = 1324069140. Its totient is φ = 1318875696.

The previous prime is 1321472393. The next prime is 1321472447. The reversal of 1321472417 is 7142741231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7142741231 = 19 ⋅375933749.

It can be written as a sum of positive squares in 2 ways, for example, as 1144874896 + 176597521 = 33836^2 + 13289^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321472417 - 2¹² = 1321468321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321472447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297598 + ... + 1298615.

It is an arithmetic number, because the mean of its divisors is an integer number (331017285).

Almost surely, 2^1321472417 is an apocalyptic number.

It is an amenable number.

1321472417 is a deficient number, since it is larger than the sum of its proper divisors (2596723).

1321472417 is an equidigital number, since it uses as much as digits as its factorization.

1321472417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596722.

The product of its digits is 9408, while the sum is 32.

The square root of 1321472417 is about 36352.0620735606. The cubic root of 1321472417 is about 1097.3690337926.

The spelling of 1321472417 in words is "one billion, three hundred twenty-one million, four hundred seventy-two thousand, four hundred seventeen".