16642253 has 2 divisors, whose sum is σ = 16642254. Its totient is φ = 16642252.

The previous prime is 16642243. The next prime is 16642313. The reversal of 16642253 is 35224661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11682724 + 4959529 = 3418^2 + 2227^2 .

It is a cyclic number.

It is not a de Polignac number, because 16642253 - 2⁴ = 16642237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16642243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8321126 + 8321127.

It is an arithmetic number, because the mean of its divisors is an integer number (8321127).

Almost surely, 2^16642253 is an apocalyptic number.

It is an amenable number.

16642253 is a deficient number, since it is larger than the sum of its proper divisors (1).

16642253 is an equidigital number, since it uses as much as digits as its factorization.

16642253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 16642253 is about 4079.4917575600. The cubic root of 16642253 is about 255.3116936958.

The spelling of 16642253 in words is "sixteen million, six hundred forty-two thousand, two hundred fifty-three".