22421402 has 8 divisors (see below), whose sum is σ = 35610516. Its totient is φ = 10551232.

The previous prime is 22421393. The next prime is 22421411. The reversal of 22421402 is 20412422.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22421393) and next prime (22421411).

It can be written as a sum of positive squares in 2 ways, for example, as 21613201 + 808201 = 4649^2 + 899^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329693 + ... + 329760.

Almost surely, 2^22421402 is an apocalyptic number.

22421402 is a deficient number, since it is larger than the sum of its proper divisors (13189114).

22421402 is a wasteful number, since it uses less digits than its factorization.

22421402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659472.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 22421402 is about 4735.1242855917. The cubic root of 22421402 is about 281.9816982573.

Adding to 22421402 its reverse (20412422), we get a palindrome (42833824).

The spelling of 22421402 in words is "twenty-two million, four hundred twenty-one thousand, four hundred two".