146581 has 2 divisors, whose sum is σ = 146582. Its totient is φ = 146580.

The previous prime is 146563. The next prime is 146603. The reversal of 146581 is 185641.

146581 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., 119025 + 27556 = 345^2 + 166^2 .

It is an emirp because it is prime and its reverse (185641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 146581 - 2¹³ = 138389 is a prime.

It is a super-2 number, since 2×146581² = 42971979122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73290 + 73291.

It is an arithmetic number, because the mean of its divisors is an integer number (73291).

2¹⁴⁶⁵⁸¹ is an apocalyptic number.

It is an amenable number.

146581 is a deficient number, since it is larger than the sum of its proper divisors (1).

146581 is an equidigital number, since it uses as much as digits as its factorization.

146581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 146581 is about 382.8589818719. The cubic root of 146581 is about 52.7261296729.

Subtracting 146581 from its reverse (185641), we obtain a triangular number (39060 = T₂₇₉).

It can be divided in two parts, 146 and 581, that added together give a palindrome (727).

The spelling of 146581 in words is "one hundred forty-six thousand, five hundred eighty-one".