16577121 has 12 divisors (see below), whose sum is σ = 24295376. Its totient is φ = 10046520.

The previous prime is 16577117. The next prime is 16577149. The reversal of 16577121 is 12177561.

It is not a de Polignac number, because 16577121 - 2² = 16577117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16577111) 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, 22471 + ... + 23196.

Almost surely, 2^16577121 is an apocalyptic number.

16577121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16577121 is a deficient number, since it is larger than the sum of its proper divisors (7718255).

16577121 is a wasteful number, since it uses less digits than its factorization.

16577121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45692 (or 45681 counting only the distinct ones).

The product of its digits is 2940, while the sum is 30.

The square root of 16577121 is about 4071.5010745424. The cubic root of 16577121 is about 254.9781911375.

It can be divided in two parts, 1657 and 7121, that added together give a palindrome (8778).

The spelling of 16577121 in words is "sixteen million, five hundred seventy-seven thousand, one hundred twenty-one".