561135 has 8 divisors (see below), whose sum is σ = 897840. Its totient is φ = 299264.

The previous prime is 561109. The next prime is 561161. The reversal of 561135 is 531165.

561135 = 333² + 334² + ... + 337².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (561109) and next prime (561161).

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

It is a cyclic number.

It is not a de Polignac number, because 561135 - 2⁵ = 561103 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18690 + ... + 18719.

It is an arithmetic number, because the mean of its divisors is an integer number (112230).

2⁵⁶¹¹³⁵ is an apocalyptic number.

561135 is a deficient number, since it is larger than the sum of its proper divisors (336705).

561135 is a wasteful number, since it uses less digits than its factorization.

561135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37417.

The product of its digits is 450, while the sum is 21.

The square root of 561135 is about 749.0894472625. The cubic root of 561135 is about 82.4813548315.

It can be divided in two parts, 561 and 135, that added together give a palindrome (696).

The spelling of 561135 in words is "five hundred sixty-one thousand, one hundred thirty-five".