921416 has 16 divisors (see below), whose sum is σ = 1741500. Its totient is φ = 457024.

The previous prime is 921409. The next prime is 921457. The reversal of 921416 is 614129.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 722500 + 198916 = 850^2 + 446^2 .

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 921391 and 921400.

It is an unprimeable number.

921416 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806 + ... + 1578.

2⁹²¹⁴¹⁶ is an apocalyptic number.

It is an amenable number.

921416 is a deficient number, since it is larger than the sum of its proper divisors (820084).

921416 is a wasteful number, since it uses less digits than its factorization.

921416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928 (or 924 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 921416 is about 959.9041618828. The cubic root of 921416 is about 97.3087550793.

The spelling of 921416 in words is "nine hundred twenty-one thousand, four hundred sixteen".