16252309 has 4 divisors (see below), whose sum is σ = 16267360. Its totient is φ = 16237260.

The previous prime is 16252307. The next prime is 16252321. The reversal of 16252309 is 90325261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16252309 - 2¹ = 16252307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16252307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5769 + ... + 8110.

It is an arithmetic number, because the mean of its divisors is an integer number (4066840).

Almost surely, 2^16252309 is an apocalyptic number.

It is an amenable number.

16252309 is a deficient number, since it is larger than the sum of its proper divisors (15051).

16252309 is a wasteful number, since it uses less digits than its factorization.

16252309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15050.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 16252309 is about 4031.4152601785. The cubic root of 16252309 is about 253.3018472333.

It can be divided in two parts, 16252 and 309, that added together give a palindrome (16561).

The spelling of 16252309 in words is "sixteen million, two hundred fifty-two thousand, three hundred nine".