16771257 has 6 divisors (see below), whose sum is σ = 24225162. Its totient is φ = 11180832.

The previous prime is 16771253. The next prime is 16771259. The reversal of 16771257 is 75217761.

It can be written as a sum of positive squares in only one way, i.e., 15492096 + 1279161 = 3936^2 + 1131^2 .

It is not a de Polignac number, because 16771257 - 2² = 16771253 is a prime.

It is a super-2 number, since 2×16771257² = 562550122720098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16771253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 931728 + ... + 931745.

It is an arithmetic number, because the mean of its divisors is an integer number (4037527).

Almost surely, 2^16771257 is an apocalyptic number.

It is an amenable number.

16771257 is a deficient number, since it is larger than the sum of its proper divisors (7453905).

16771257 is a wasteful number, since it uses less digits than its factorization.

16771257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863479 (or 1863476 counting only the distinct ones).

The product of its digits is 20580, while the sum is 36.

The square root of 16771257 is about 4095.2725184046. The cubic root of 16771257 is about 255.9696873695.

The spelling of 16771257 in words is "sixteen million, seven hundred seventy-one thousand, two hundred fifty-seven".