16431061 has 8 divisors (see below), whose sum is σ = 17458200. Its totient is φ = 15410688.

The previous prime is 16431053. The next prime is 16431097. The reversal of 16431061 is 16013461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28561 + 16402500 = 169^2 + 4050^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16431061 - 2³ = 16431053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16431161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3865 + ... + 6913.

It is an arithmetic number, because the mean of its divisors is an integer number (2182275).

Almost surely, 2^16431061 is an apocalyptic number.

It is an amenable number.

16431061 is a deficient number, since it is larger than the sum of its proper divisors (1027139).

16431061 is a wasteful number, since it uses less digits than its factorization.

16431061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 16431061 is about 4053.5245157764. The cubic root of 16431061 is about 254.2271151515.

It can be divided in two parts, 1643 and 1061, that added together give a square (2704 = 52²).

The spelling of 16431061 in words is "sixteen million, four hundred thirty-one thousand, sixty-one".