921173452 has 12 divisors (see below), whose sum is σ = 1612985416. Its totient is φ = 460320480.

The previous prime is 921173399. The next prime is 921173459. The reversal of 921173452 is 254371129.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (921173459) 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, 58674 + ... + 72697.

Almost surely, 2^921173452 is an apocalyptic number.

It is an amenable number.

921173452 is a deficient number, since it is larger than the sum of its proper divisors (691811964).

921173452 is a wasteful number, since it uses less digits than its factorization.

921173452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133128 (or 133126 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 921173452 is about 30350.8393953116. The cubic root of 921173452 is about 973.0021600642.

The spelling of 921173452 in words is "nine hundred twenty-one million, one hundred seventy-three thousand, four hundred fifty-two".