921622 has 8 divisors (see below), whose sum is σ = 1488816. Its totient is φ = 425352.

The previous prime is 921611. The next prime is 921629. The reversal of 921622 is 226129.

It is a happy number.

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

It is a super-2 number, since 2×921622² = 1698774221768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 921593 and 921602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921629) by changing a digit.

921622 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17698 + ... + 17749.

It is an arithmetic number, because the mean of its divisors is an integer number (186102).

2⁹²¹⁶²² is an apocalyptic number.

921622 is a deficient number, since it is larger than the sum of its proper divisors (567194).

921622 is a wasteful number, since it uses less digits than its factorization.

921622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35462.

The product of its digits is 432, while the sum is 22.

The square root of 921622 is about 960.0114582650. The cubic root of 921622 is about 97.3160062774.

Subtracting from 921622 its sum of digits (22), we obtain a square (921600 = 960²).

The spelling of 921622 in words is "nine hundred twenty-one thousand, six hundred twenty-two".