921971265 has 8 divisors (see below), whose sum is σ = 1475154048. Its totient is φ = 491718000.

The previous prime is 921971249. The next prime is 921971269. The reversal of 921971265 is 562179129.

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

It is not a de Polignac number, because 921971265 - 2⁴ = 921971249 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (921971269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30732361 + ... + 30732390.

It is an arithmetic number, because the mean of its divisors is an integer number (184394256).

Almost surely, 2^921971265 is an apocalyptic number.

It is an amenable number.

921971265 is a deficient number, since it is larger than the sum of its proper divisors (553182783).

921971265 is a wasteful number, since it uses less digits than its factorization.

921971265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61464759.

The product of its digits is 68040, while the sum is 42.

The square root of 921971265 is about 30363.9797292779. The cubic root of 921971265 is about 973.2829793361.

The spelling of 921971265 in words is "nine hundred twenty-one million, nine hundred seventy-one thousand, two hundred sixty-five".