16140257 has 6 divisors (see below), whose sum is σ = 18775458. Its totient is φ = 13834464.

The previous prime is 16140247. The next prime is 16140277. The reversal of 16140257 is 75204161.

It can be written as a sum of positive squares in only one way, i.e., 16032016 + 108241 = 4004^2 + 329^2 .

It is not a de Polignac number, because 16140257 - 2⁶ = 16140193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16140247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 164648 + ... + 164745.

It is an arithmetic number, because the mean of its divisors is an integer number (3129243).

Almost surely, 2^16140257 is an apocalyptic number.

It is an amenable number.

16140257 is a deficient number, since it is larger than the sum of its proper divisors (2635201).

16140257 is an equidigital number, since it uses as much as digits as its factorization.

16140257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329407 (or 329400 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 16140257 is about 4017.4938705616. The cubic root of 16140257 is about 252.7183720142.

The spelling of 16140257 in words is "sixteen million, one hundred forty thousand, two hundred fifty-seven".