147581 has 8 divisors (see below), whose sum is σ = 174720. Its totient is φ = 121968.

The previous prime is 147571. The next prime is 147583. The reversal of 147581 is 185741.

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

It is not a de Polignac number, because 147581 - 2⁶ = 147517 is a prime.

It is a super-2 number, since 2×147581² = 43560303122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 147581.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 147581.

It is not an unprimeable number, because it can be changed into a prime (147583) 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, 161 + ... + 566.

It is an arithmetic number, because the mean of its divisors is an integer number (21840).

2¹⁴⁷⁵⁸¹ is an apocalyptic number.

It is an amenable number.

147581 is a deficient number, since it is larger than the sum of its proper divisors (27139).

147581 is an equidigital number, since it uses as much as digits as its factorization.

147581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763.

The product of its digits is 1120, while the sum is 26.

The square root of 147581 is about 384.1627259379. The cubic root of 147581 is about 52.8457601842.

The spelling of 147581 in words is "one hundred forty-seven thousand, five hundred eighty-one".