16405253 has 2 divisors, whose sum is σ = 16405254. Its totient is φ = 16405252.

The previous prime is 16405247. The next prime is 16405283. The reversal of 16405253 is 35250461.

16405253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13300609 + 3104644 = 3647^2 + 1762^2 .

It is an emirp because it is prime and its reverse (35250461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16405253 - 2⁴ = 16405237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16405283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8202626 + 8202627.

It is an arithmetic number, because the mean of its divisors is an integer number (8202627).

Almost surely, 2^16405253 is an apocalyptic number.

It is an amenable number.

16405253 is a deficient number, since it is larger than the sum of its proper divisors (1).

16405253 is an equidigital number, since it uses as much as digits as its factorization.

16405253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 16405253 is about 4050.3398622832. The cubic root of 16405253 is about 254.0939419392.

The spelling of 16405253 in words is "sixteen million, four hundred five thousand, two hundred fifty-three".