148580581 has 2 divisors, whose sum is σ = 148580582. Its totient is φ = 148580580.

The previous prime is 148580573. The next prime is 148580591. The reversal of 148580581 is 185085841.

148580581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111492481 + 37088100 = 10559^2 + 6090^2 .

It is a cyclic number.

It is not a de Polignac number, because 148580581 - 2³ = 148580573 is a prime.

It is a super-2 number, since 2×148580581² = 44152378100595122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148580501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74290290 + 74290291.

It is an arithmetic number, because the mean of its divisors is an integer number (74290291).

Almost surely, 2^148580581 is an apocalyptic number.

It is an amenable number.

148580581 is a deficient number, since it is larger than the sum of its proper divisors (1).

148580581 is an equidigital number, since it uses as much as digits as its factorization.

148580581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51200, while the sum is 40.

The square root of 148580581 is about 12189.3634370298. The cubic root of 148580581 is about 529.6480171537.

The spelling of 148580581 in words is "one hundred forty-eight million, five hundred eighty thousand, five hundred eighty-one".