22645121 has 2 divisors, whose sum is σ = 22645122. Its totient is φ = 22645120.

The previous prime is 22645099. The next prime is 22645127. The reversal of 22645121 is 12154622.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14025025 + 8620096 = 3745^2 + 2936^2 .

It is a cyclic number.

It is not a de Polignac number, because 22645121 - 2⁶ = 22645057 is a prime.

It is a Chen prime.

It is equal to p_1427261 and since 22645121 and 1427261 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (22645127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11322560 + 11322561.

It is an arithmetic number, because the mean of its divisors is an integer number (11322561).

Almost surely, 2^22645121 is an apocalyptic number.

It is an amenable number.

22645121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22645121 is an equidigital number, since it uses as much as digits as its factorization.

22645121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 22645121 is about 4758.6890001344. The cubic root of 22645121 is about 282.9164599194.

Adding to 22645121 its reverse (12154622), we get a palindrome (34799743).

The spelling of 22645121 in words is "twenty-two million, six hundred forty-five thousand, one hundred twenty-one".