40402253 has 2 divisors, whose sum is σ = 40402254. Its totient is φ = 40402252.

The previous prime is 40402177. The next prime is 40402291. The reversal of 40402253 is 35220404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34316164 + 6086089 = 5858^2 + 2467^2 .

It is a cyclic number.

It is not a de Polignac number, because 40402253 - 2¹⁴ = 40385869 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40402553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20201126 + 20201127.

It is an arithmetic number, because the mean of its divisors is an integer number (20201127).

Almost surely, 2^40402253 is an apocalyptic number.

It is an amenable number.

40402253 is a deficient number, since it is larger than the sum of its proper divisors (1).

40402253 is an equidigital number, since it uses as much as digits as its factorization.

40402253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 40402253 is about 6356.2766616943. The cubic root of 40402253 is about 343.1377727126.

Adding to 40402253 its reverse (35220404), we get a palindrome (75622657).

The spelling of 40402253 in words is "forty million, four hundred two thousand, two hundred fifty-three".