16261287 has 16 divisors (see below), whose sum is σ = 25286400. Its totient is φ = 9291576.

The previous prime is 16261247. The next prime is 16261307. The reversal of 16261287 is 78216261.

It is not a de Polignac number, because 16261287 - 2⁷ = 16261159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16261237) 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, 6873 + ... + 8930.

It is an arithmetic number, because the mean of its divisors is an integer number (1580400).

Almost surely, 2^16261287 is an apocalyptic number.

16261287 is a deficient number, since it is larger than the sum of its proper divisors (9025113).

16261287 is an equidigital number, since it uses as much as digits as its factorization.

16261287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15827 (or 15813 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 16261287 is about 4032.5286111818. The cubic root of 16261287 is about 253.3484811272.

The spelling of 16261287 in words is "sixteen million, two hundred sixty-one thousand, two hundred eighty-seven".