148845581 has 4 divisors (see below), whose sum is σ = 155317152. Its totient is φ = 142374012.

The previous prime is 148845553. The next prime is 148845589. The reversal of 148845581 is 185548841.

148845581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-148845581 is a prime.

It is a super-2 number, since 2×148845581² = 44310013966455122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148845589) 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, 3235751 + ... + 3235796.

It is an arithmetic number, because the mean of its divisors is an integer number (38829288).

Almost surely, 2^148845581 is an apocalyptic number.

It is an amenable number.

148845581 is a deficient number, since it is larger than the sum of its proper divisors (6471571).

148845581 is an equidigital number, since it uses as much as digits as its factorization.

148845581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6471570.

The product of its digits is 204800, while the sum is 44.

The square root of 148845581 is about 12200.2287273641. The cubic root of 148845581 is about 529.9627136460.

The spelling of 148845581 in words is "one hundred forty-eight million, eight hundred forty-five thousand, five hundred eighty-one".