561242005 has 8 divisors (see below), whose sum is σ = 676286424. Its totient is φ = 447129600.

The previous prime is 561241987. The next prime is 561242023. The reversal of 561242005 is 500242165.

It is an interprime number because it is at equal distance from previous prime (561241987) and next prime (561242023).

It can be written as a sum of positive squares in 4 ways, for example, as 108701476 + 452540529 = 10426^2 + 21273^2 .

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

It is not a de Polignac number, because 561242005 - 2¹⁵ = 561209237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231676 + ... + 234085.

It is an arithmetic number, because the mean of its divisors is an integer number (84535803).

Almost surely, 2^561242005 is an apocalyptic number.

It is an amenable number.

561242005 is a deficient number, since it is larger than the sum of its proper divisors (115044419).

561242005 is a wasteful number, since it uses less digits than its factorization.

561242005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466007.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 561242005 is about 23690.5467433742. The cubic root of 561242005 is about 824.8659739426.

The spelling of 561242005 in words is "five hundred sixty-one million, two hundred forty-two thousand, five".