22421765 has 8 divisors (see below), whose sum is σ = 27004920. Its totient is φ = 17871552.

The previous prime is 22421747. The next prime is 22421771. The reversal of 22421765 is 56712422.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 388129 + 22033636 = 623^2 + 4694^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22421765 - 2¹² = 22417669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6710 + ... + 9479.

It is an arithmetic number, because the mean of its divisors is an integer number (3375615).

Almost surely, 2^22421765 is an apocalyptic number.

It is an amenable number.

22421765 is a deficient number, since it is larger than the sum of its proper divisors (4583155).

22421765 is a wasteful number, since it uses less digits than its factorization.

22421765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16471.

The product of its digits is 6720, while the sum is 29.

The square root of 22421765 is about 4735.1626160038. The cubic root of 22421765 is about 281.9832199998.

The spelling of 22421765 in words is "twenty-two million, four hundred twenty-one thousand, seven hundred sixty-five".