16257145 has 8 divisors (see below), whose sum is σ = 19531080. Its totient is φ = 12990720.

The previous prime is 16257133. The next prime is 16257161. The reversal of 16257145 is 54175261.

It can be written as a sum of positive squares in 4 ways, for example, as 121 + 16257024 = 11^2 + 4032^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16257145 - 2⁹ = 16256633 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5611 + ... + 7999.

It is an arithmetic number, because the mean of its divisors is an integer number (2441385).

Almost surely, 2^16257145 is an apocalyptic number.

It is an amenable number.

16257145 is a deficient number, since it is larger than the sum of its proper divisors (3273935).

16257145 is a wasteful number, since it uses less digits than its factorization.

16257145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3755.

The product of its digits is 8400, while the sum is 31.

The square root of 16257145 is about 4032.0150049324. The cubic root of 16257145 is about 253.3269687151.

The spelling of 16257145 in words is "sixteen million, two hundred fifty-seven thousand, one hundred forty-five".