4231581 has 4 divisors (see below), whose sum is σ = 5642112. Its totient is φ = 2821052.

The previous prime is 4231567. The next prime is 4231603. The reversal of 4231581 is 1851324.

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 not a de Polignac number, because 4231581 - 2⁹ = 4231069 is a prime.

It is a super-2 number, since 2×4231581² = 35812555519122, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4231541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705261 + ... + 705266.

It is an arithmetic number, because the mean of its divisors is an integer number (1410528).

Almost surely, 2^4231581 is an apocalyptic number.

It is an amenable number.

4231581 is a deficient number, since it is larger than the sum of its proper divisors (1410531).

4231581 is a wasteful number, since it uses less digits than its factorization.

4231581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410530.

The product of its digits is 960, while the sum is 24.

The square root of 4231581 is about 2057.0806984657. The cubic root of 4231581 is about 161.7462495955.

The spelling of 4231581 in words is "four million, two hundred thirty-one thousand, five hundred eighty-one".