561612127 has 4 divisors (see below), whose sum is σ = 591170680. Its totient is φ = 532053576.

The previous prime is 561612109. The next prime is 561612179. The reversal of 561612127 is 721216165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561612127 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561616127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14779248 + ... + 14779285.

It is an arithmetic number, because the mean of its divisors is an integer number (147792670).

Almost surely, 2^561612127 is an apocalyptic number.

561612127 is a deficient number, since it is larger than the sum of its proper divisors (29558553).

561612127 is a wasteful number, since it uses less digits than its factorization.

561612127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29558552.

The product of its digits is 5040, while the sum is 31.

The square root of 561612127 is about 23698.3570527579. The cubic root of 561612127 is about 825.0472587559.

The spelling of 561612127 in words is "five hundred sixty-one million, six hundred twelve thousand, one hundred twenty-seven".