56561001 has 8 divisors (see below), whose sum is σ = 86188224. Its totient is φ = 32320560.

The previous prime is 56560997. The next prime is 56561003. The reversal of 56561001 is 10016565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56561001 - 2² = 56560997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56561003) 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, 1346670 + ... + 1346711.

It is an arithmetic number, because the mean of its divisors is an integer number (10773528).

Almost surely, 2^56561001 is an apocalyptic number.

It is an amenable number.

56561001 is a deficient number, since it is larger than the sum of its proper divisors (29627223).

56561001 is a wasteful number, since it uses less digits than its factorization.

56561001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693391.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 56561001 is about 7520.7048206933. The cubic root of 56561001 is about 383.8595610029.

Adding to 56561001 its reverse (10016565), we get a palindrome (66577566).

The spelling of 56561001 in words is "fifty-six million, five hundred sixty-one thousand, one".