16543401 has 16 divisors (see below), whose sum is σ = 25411584. Its totient is φ = 9377424.

The previous prime is 16543399. The next prime is 16543411. The reversal of 16543401 is 10434561.

It is not a de Polignac number, because 16543401 - 2¹ = 16543399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16543411) 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, 435 + ... + 5768.

It is an arithmetic number, because the mean of its divisors is an integer number (1588224).

Almost surely, 2^16543401 is an apocalyptic number.

It is an amenable number.

16543401 is a deficient number, since it is larger than the sum of its proper divisors (8868183).

16543401 is a wasteful number, since it uses less digits than its factorization.

16543401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6340.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 16543401 is about 4067.3579876868. The cubic root of 16543401 is about 254.8051876161.

Adding to 16543401 its reverse (10434561), we get a palindrome (26977962).

The spelling of 16543401 in words is "sixteen million, five hundred forty-three thousand, four hundred one".