921489242 has 8 divisors (see below), whose sum is σ = 1383577632. Its totient is φ = 460296700.

The previous prime is 921489223. The next prime is 921489251. The reversal of 921489242 is 242984129.

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

It is a self number, because there is not a number n which added to its sum of digits gives 921489242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221384 + ... + 225507.

It is an arithmetic number, because the mean of its divisors is an integer number (172947204).

Almost surely, 2^921489242 is an apocalyptic number.

921489242 is a deficient number, since it is larger than the sum of its proper divisors (462088390).

921489242 is a wasteful number, since it uses less digits than its factorization.

921489242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447924.

The product of its digits is 82944, while the sum is 41.

The square root of 921489242 is about 30356.0412768200. The cubic root of 921489242 is about 973.1133332086.

The spelling of 921489242 in words is "nine hundred twenty-one million, four hundred eighty-nine thousand, two hundred forty-two".