16409061 has 36 divisors (see below), whose sum is σ = 25625964. Its totient is φ = 10497600.

The previous prime is 16409039. The next prime is 16409083. The reversal of 16409061 is 16090461.

It is an interprime number because it is at equal distance from previous prime (16409039) and next prime (16409083).

It can be written as a sum of positive squares in 2 ways, for example, as 656100 + 15752961 = 810^2 + 3969^2 .

It is not a de Polignac number, because 16409061 - 2¹⁰ = 16408037 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 (16409461) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 268971 + ... + 269031.

Almost surely, 2^16409061 is an apocalyptic number.

It is an amenable number.

16409061 is a deficient number, since it is larger than the sum of its proper divisors (9216903).

16409061 is an frugal number, since it uses more digits than its factorization.

16409061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 16409061 is about 4050.8099190162. The cubic root of 16409061 is about 254.1136005789.

It can be divided in two parts, 1640 and 9061, that added together give a palindrome (10701).

The spelling of 16409061 in words is "sixteen million, four hundred nine thousand, sixty-one".