921214420 has 48 divisors (see below), whose sum is σ = 2230518528. Its totient is φ = 313044480.

The previous prime is 921214417. The next prime is 921214451. The reversal of 921214420 is 24412129.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13296 + ... + 44935.

It is an arithmetic number, because the mean of its divisors is an integer number (46469136).

Almost surely, 2^921214420 is an apocalyptic number.

It is an amenable number.

921214420 is an abundant number, since it is smaller than the sum of its proper divisors (1309304108).

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

921214420 is a wasteful number, since it uses less digits than its factorization.

921214420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58360 (or 58358 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 921214420 is about 30351.5142950068. The cubic root of 921214420 is about 973.0165841887.

Adding to 921214420 its reverse (24412129), we get a palindrome (945626549).

It can be divided in two parts, 9212 and 14420, that added together give a palindrome (23632).

The spelling of 921214420 in words is "nine hundred twenty-one million, two hundred fourteen thousand, four hundred twenty".