56001605 has 16 divisors (see below), whose sum is σ = 74348928. Its totient is φ = 40152000.

The previous prime is 56001601. The next prime is 56001611. The reversal of 56001605 is 50610065.

It is not a de Polignac number, because 56001605 - 2² = 56001601 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56001601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3266 + ... + 11075.

It is an arithmetic number, because the mean of its divisors is an integer number (4646808).

Almost surely, 2^56001605 is an apocalyptic number.

56001605 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56001605 is a deficient number, since it is larger than the sum of its proper divisors (18347323).

56001605 is a wasteful number, since it uses less digits than its factorization.

56001605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14428.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 56001605 is about 7483.4220113528. The cubic root of 56001605 is about 382.5898915845.

The spelling of 56001605 in words is "fifty-six million, one thousand, six hundred five".