921426 has 32 divisors (see below), whose sum is σ = 2101248. Its totient is φ = 266640.

The previous prime is 921409. The next prime is 921457. The reversal of 921426 is 624129.

921426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 921396 and 921405.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 921426.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1215 + ... + 1821.

It is an arithmetic number, because the mean of its divisors is an integer number (65664).

2⁹²¹⁴²⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050624).

921426 is an abundant number, since it is smaller than the sum of its proper divisors (1179822).

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

921426 is a wasteful number, since it uses less digits than its factorization.

921426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its digits is 864, while the sum is 24.

The square root of 921426 is about 959.9093707220. The cubic root of 921426 is about 97.3091071042.

The spelling of 921426 in words is "nine hundred twenty-one thousand, four hundred twenty-six".