148581 has 8 divisors (see below), whose sum is σ = 220160. Its totient is φ = 99036.

The previous prime is 148579. The next prime is 148609. The reversal of 148581 is 185841.

It is not a de Polignac number, because 148581 - 2¹ = 148579 is a prime.

It is a super-2 number, since 2×148581² = 44152627122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5503 = 148581 / (1 + 4 + 8 + 5 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2725 + ... + 2778.

It is an arithmetic number, because the mean of its divisors is an integer number (27520).

2¹⁴⁸⁵⁸¹ is an apocalyptic number.

It is an amenable number.

148581 is a deficient number, since it is larger than the sum of its proper divisors (71579).

148581 is an equidigital number, since it uses as much as digits as its factorization.

148581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5512 (or 5506 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 148581 is about 385.4620603899. The cubic root of 148581 is about 52.9648515026.

It can be divided in two parts, 148 and 581, that added together give a 6-th power (729 = 3⁶).

The spelling of 148581 in words is "one hundred forty-eight thousand, five hundred eighty-one".