565672121 has 24 divisors (see below), whose sum is σ = 677214720. Its totient is φ = 470836800.

The previous prime is 565672111. The next prime is 565672139. The reversal of 565672121 is 121276565.

It is a de Polignac number, because none of the positive numbers 2^k-565672121 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (565672111) 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 23 ways as a sum of consecutive naturals, for example, 543920 + ... + 544958.

It is an arithmetic number, because the mean of its divisors is an integer number (28217280).

Almost surely, 2^565672121 is an apocalyptic number.

It is an amenable number.

565672121 is a deficient number, since it is larger than the sum of its proper divisors (111542599).

565672121 is a wasteful number, since it uses less digits than its factorization.

565672121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365 (or 1358 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 565672121 is about 23783.8626173294. The cubic root of 565672121 is about 827.0306248519.

It can be divided in two parts, 5656 and 72121, that added together give a palindrome (77777).

The spelling of 565672121 in words is "five hundred sixty-five million, six hundred seventy-two thousand, one hundred twenty-one".