561614121 has 8 divisors (see below), whose sum is σ = 832020960. Its totient is φ = 374409396.

The previous prime is 561614093. The next prime is 561614173. The reversal of 561614121 is 121416165.

561614121 is a `hidden beast` number, since 5 + 616 + 1 + 41 + 2 + 1 = 666.

It is not a de Polignac number, because 561614121 - 2¹⁹ = 561089833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 20800523 = 561614121 / (5 + 6 + 1 + 6 + 1 + 4 + 1 + 2 + 1).

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 (561634121) 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, 10400235 + ... + 10400288.

It is an arithmetic number, because the mean of its divisors is an integer number (104002620).

Almost surely, 2^561614121 is an apocalyptic number.

It is an amenable number.

561614121 is a deficient number, since it is larger than the sum of its proper divisors (270406839).

561614121 is a wasteful number, since it uses less digits than its factorization.

561614121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20800532 (or 20800526 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 561614121 is about 23698.3991231475. The cubic root of 561614121 is about 825.0482351963.

The spelling of 561614121 in words is "five hundred sixty-one million, six hundred fourteen thousand, one hundred twenty-one".