16406253 has 16 divisors (see below), whose sum is σ = 25585600. Its totient is φ = 10361520.

The previous prime is 16406251. The next prime is 16406261. The reversal of 16406253 is 35260461.

16406253 is a `hidden beast` number, since 1 + 6 + 406 + 253 = 666.

It is not a de Polignac number, because 16406253 - 2¹ = 16406251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16406251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15478 + ... + 16503.

It is an arithmetic number, because the mean of its divisors is an integer number (1599100).

Almost surely, 2^16406253 is an apocalyptic number.

It is an amenable number.

16406253 is a deficient number, since it is larger than the sum of its proper divisors (9179347).

16406253 is a wasteful number, since it uses less digits than its factorization.

16406253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32009 (or 32003 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 16406253 is about 4050.4633068329. The cubic root of 16406253 is about 254.0991046917.

The spelling of 16406253 in words is "sixteen million, four hundred six thousand, two hundred fifty-three".