561051 has 24 divisors (see below), whose sum is σ = 907920. Its totient is φ = 331776.

The previous prime is 561047. The next prime is 561053. The reversal of 561051 is 150165.

561051 is a `hidden beast` number, since 5 + 610 + 51 = 666.

It is not a de Polignac number, because 561051 - 2² = 561047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561053) 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 23 ways as a sum of consecutive naturals, for example, 2811 + ... + 3003.

It is an arithmetic number, because the mean of its divisors is an integer number (37830).

2⁵⁶¹⁰⁵¹ is an apocalyptic number.

561051 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

561051 is a deficient number, since it is larger than the sum of its proper divisors (346869).

561051 is a wasteful number, since it uses less digits than its factorization.

561051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 561051 is about 749.0333770934. The cubic root of 561051 is about 82.4772389000.

The spelling of 561051 in words is "five hundred sixty-one thousand, fifty-one".