921257112 has 64 divisors (see below), whose sum is σ = 2381258880. Its totient is φ = 296819712.

The previous prime is 921257083. The next prime is 921257119. The reversal of 921257112 is 211752129.

It is a self number, because there is not a number n which added to its sum of digits gives 921257112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921257119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95503 + ... + 104705.

It is an arithmetic number, because the mean of its divisors is an integer number (37207170).

Almost surely, 2^921257112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921257112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1190629440).

921257112 is an abundant number, since it is smaller than the sum of its proper divisors (1460001768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

921257112 is a wasteful number, since it uses less digits than its factorization.

921257112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9352 (or 9348 counting only the distinct ones).

The product of its digits is 2520, while the sum is 30.

The square root of 921257112 is about 30352.2175796102. The cubic root of 921257112 is about 973.0316148488.

The spelling of 921257112 in words is "nine hundred twenty-one million, two hundred fifty-seven thousand, one hundred twelve".