16579121 has 8 divisors (see below), whose sum is σ = 17886120. Its totient is φ = 15276672.

The previous prime is 16579111. The next prime is 16579127. The reversal of 16579121 is 12197561.

16579121 = 786² + 787² + ... + 811².

It can be written as a sum of positive squares in 4 ways, for example, as 579121 + 16000000 = 761^2 + 4000^2 .

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 16579121 - 2¹⁰ = 16578097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16579127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13301 + ... + 14493.

It is an arithmetic number, because the mean of its divisors is an integer number (2235765).

Almost surely, 2^16579121 is an apocalyptic number.

It is an amenable number.

16579121 is a deficient number, since it is larger than the sum of its proper divisors (1306999).

16579121 is a wasteful number, since it uses less digits than its factorization.

16579121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275.

The product of its digits is 3780, while the sum is 32.

The square root of 16579121 is about 4071.7466767961. The cubic root of 16579121 is about 254.9884449461.

It can be divided in two parts, 16 and 579121, that multiplied together give a square (9265936 = 3044²).

The spelling of 16579121 in words is "sixteen million, five hundred seventy-nine thousand, one hundred twenty-one".