16000257 has 64 divisors (see below), whose sum is σ = 28385280. Its totient is φ = 7789824.

The previous prime is 16000253. The next prime is 16000277. The reversal of 16000257 is 75200061.

It is not a de Polignac number, because 16000257 - 2² = 16000253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (16000253) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 340408 + ... + 340454.

It is an arithmetic number, because the mean of its divisors is an integer number (443520).

Almost surely, 2^16000257 is an apocalyptic number.

It is an amenable number.

16000257 is a deficient number, since it is larger than the sum of its proper divisors (12385023).

16000257 is a wasteful number, since it uses less digits than its factorization.

16000257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 16000257 is about 4000.0321248710. The cubic root of 16000257 is about 251.9855591372.

The spelling of 16000257 in words is "sixteen million, two hundred fifty-seven", and thus it is an aban number.