814248921 has 32 divisors (see below), whose sum is σ = 1183196160. Its totient is φ = 496510784.

The previous prime is 814248907. The next prime is 814248937. The reversal of 814248921 is 129842418.

It is a cyclic number.

It is not a de Polignac number, because 814248921 - 2¹³ = 814240729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 814248921.

It is not an unprimeable number, because it can be changed into a prime (814248121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212206 + ... + 216008.

It is an arithmetic number, because the mean of its divisors is an integer number (36974880).

Almost surely, 2^814248921 is an apocalyptic number.

It is an amenable number.

814248921 is a deficient number, since it is larger than the sum of its proper divisors (368947239).

814248921 is a wasteful number, since it uses less digits than its factorization.

814248921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965.

The product of its digits is 36864, while the sum is 39.

The square root of 814248921 is about 28535.0472401922. The cubic root of 814248921 is about 933.7968342252.

The spelling of 814248921 in words is "eight hundred fourteen million, two hundred forty-eight thousand, nine hundred twenty-one".