16257987 has 12 divisors (see below), whose sum is σ = 24505104. Its totient is φ = 10367280.

The previous prime is 16257973. The next prime is 16258007. The reversal of 16257987 is 78975261.

16257987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16257987 - 2⁴ = 16257971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16257907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39064 + ... + 39477.

It is an arithmetic number, because the mean of its divisors is an integer number (2042092).

Almost surely, 2^16257987 is an apocalyptic number.

16257987 is a deficient number, since it is larger than the sum of its proper divisors (8247117).

16257987 is a wasteful number, since it uses less digits than its factorization.

16257987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78570 (or 78567 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 16257987 is about 4032.1194178744. The cubic root of 16257987 is about 253.3313421281.

The spelling of 16257987 in words is "sixteen million, two hundred fifty-seven thousand, nine hundred eighty-seven".