123585581 has 8 divisors (see below), whose sum is σ = 141335040. Its totient is φ = 105859728.

The previous prime is 123585577. The next prime is 123585611. The reversal of 123585581 is 185585321.

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 123585581 - 2² = 123585577 is a prime.

It is a super-2 number, since 2×123585581² = 30546791662215122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123585551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7295 + ... + 17331.

It is an arithmetic number, because the mean of its divisors is an integer number (17666880).

Almost surely, 2^123585581 is an apocalyptic number.

It is an amenable number.

123585581 is a deficient number, since it is larger than the sum of its proper divisors (17749459).

123585581 is a wasteful number, since it uses less digits than its factorization.

123585581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11803.

The product of its digits is 48000, while the sum is 38.

The square root of 123585581 is about 11116.9051898449. The cubic root of 123585581 is about 498.1069497670.

The spelling of 123585581 in words is "one hundred twenty-three million, five hundred eighty-five thousand, five hundred eighty-one".