537581 has 4 divisors (see below), whose sum is σ = 586464. Its totient is φ = 488700.

The previous prime is 537569. The next prime is 537583. The reversal of 537581 is 185735.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-537581 is a prime.

It is a super-2 number, since 2×537581² = 577986663122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537583) 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 3 ways as a sum of consecutive naturals, for example, 24425 + ... + 24446.

It is an arithmetic number, because the mean of its divisors is an integer number (146616).

537581 is a Friedman number, since it can be written as (8+7-1)^5-3^5, using all its digits and the basic arithmetic operations.

2⁵³⁷⁵⁸¹ is an apocalyptic number.

It is an amenable number.

537581 is a deficient number, since it is larger than the sum of its proper divisors (48883).

537581 is a wasteful number, since it uses less digits than its factorization.

537581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48882.

The product of its digits is 4200, while the sum is 29.

The square root of 537581 is about 733.1991543912. The cubic root of 537581 is about 81.3107506207.

The spelling of 537581 in words is "five hundred thirty-seven thousand, five hundred eighty-one".