16801257 has 16 divisors (see below), whose sum is σ = 24680448. Its totient is φ = 10081680.

The previous prime is 16801243. The next prime is 16801277. The reversal of 16801257 is 75210861.

It is not a de Polignac number, because 16801257 - 2⁶ = 16801193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16801207) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 928 + ... + 5870.

It is an arithmetic number, because the mean of its divisors is an integer number (1542528).

Almost surely, 2^16801257 is an apocalyptic number.

It is an amenable number.

16801257 is a deficient number, since it is larger than the sum of its proper divisors (7879191).

16801257 is a wasteful number, since it uses less digits than its factorization.

16801257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5060.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 16801257 is about 4098.9336418147. The cubic root of 16801257 is about 256.1222204890.

The spelling of 16801257 in words is "sixteen million, eight hundred one thousand, two hundred fifty-seven".