561159401 has 12 divisors (see below), whose sum is σ = 617407812. Its totient is φ = 509652000.

The previous prime is 561159301. The next prime is 561159407. The reversal of 561159401 is 104951165.

561159401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 374809600 + 186349801 = 19360^2 + 13651^2 .

It is not a de Polignac number, because 561159401 - 2²⁶ = 494050537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561159407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194711 + ... + 197571.

It is an arithmetic number, because the mean of its divisors is an integer number (51450651).

Almost surely, 2^561159401 is an apocalyptic number.

It is an amenable number.

561159401 is a deficient number, since it is larger than the sum of its proper divisors (56248411).

561159401 is a wasteful number, since it uses less digits than its factorization.

561159401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504 (or 4493 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 561159401 is about 23688.8032834080. The cubic root of 561159401 is about 824.8255038356.

The spelling of 561159401 in words is "five hundred sixty-one million, one hundred fifty-nine thousand, four hundred one".