16541901 has 40 divisors (see below), whose sum is σ = 26893944. Its totient is φ = 10091520.

The previous prime is 16541891. The next prime is 16541909. The reversal of 16541901 is 10914561.

16541901 is a `hidden beast` number, since 1 + 654 + 1 + 9 + 0 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4284900 + 12257001 = 2070^2 + 3501^2 .

It is not a de Polignac number, because 16541901 - 2⁷ = 16541773 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16541909) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 56311 + ... + 56603.

Almost surely, 2^16541901 is an apocalyptic number.

16541901 is the 3321-st pentagonal number.

It is an amenable number.

16541901 is a deficient number, since it is larger than the sum of its proper divisors (10352043).

16541901 is a wasteful number, since it uses less digits than its factorization.

16541901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 16541901 is about 4067.1735886239. The cubic root of 16541901 is about 254.7974862708.

The spelling of 16541901 in words is "sixteen million, five hundred forty-one thousand, nine hundred one".