16122861 has 16 divisors (see below), whose sum is σ = 24532800. Its totient is φ = 10457424.

The previous prime is 16122859. The next prime is 16122889. The reversal of 16122861 is 16822161.

It is not a de Polignac number, because 16122861 - 2¹ = 16122859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16122761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7071 + ... + 9068.

It is an arithmetic number, because the mean of its divisors is an integer number (1533300).

Almost surely, 2^16122861 is an apocalyptic number.

It is an amenable number.

16122861 is a deficient number, since it is larger than the sum of its proper divisors (8409939).

16122861 is a wasteful number, since it uses less digits than its factorization.

16122861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16185 (or 16179 counting only the distinct ones).

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

The square root of 16122861 is about 4015.3282555726. The cubic root of 16122861 is about 252.6275459266.

The spelling of 16122861 in words is "sixteen million, one hundred twenty-two thousand, eight hundred sixty-one".