16281261 has 6 divisors (see below), whose sum is σ = 23517390. Its totient is φ = 10854168.

The previous prime is 16281259. The next prime is 16281269. The reversal of 16281261 is 16218261.

It can be written as a sum of positive squares in only one way, i.e., 16281225 + 36 = 4035^2 + 6^2 .

It is not a de Polignac number, because 16281261 - 2¹ = 16281259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16281269) 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, 904506 + ... + 904523.

It is an arithmetic number, because the mean of its divisors is an integer number (3919565).

Almost surely, 2^16281261 is an apocalyptic number.

It is an amenable number.

16281261 is a deficient number, since it is larger than the sum of its proper divisors (7236129).

16281261 is a wasteful number, since it uses less digits than its factorization.

16281261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809035 (or 1809032 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 16281261 is about 4035.0044609641. The cubic root of 16281261 is about 253.4521693543.

The spelling of 16281261 in words is "sixteen million, two hundred eighty-one thousand, two hundred sixty-one".