146444581 has 2 divisors, whose sum is σ = 146444582. Its totient is φ = 146444580.

The previous prime is 146444569. The next prime is 146444603. The reversal of 146444581 is 185444641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95550625 + 50893956 = 9775^2 + 7134^2 .

It is a cyclic number.

It is not a de Polignac number, because 146444581 - 2¹¹ = 146442533 is a prime.

It is a super-2 number, since 2×146444581² = 42892030608531122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 146444581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146444531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73222290 + 73222291.

It is an arithmetic number, because the mean of its divisors is an integer number (73222291).

Almost surely, 2^146444581 is an apocalyptic number.

It is an amenable number.

146444581 is a deficient number, since it is larger than the sum of its proper divisors (1).

146444581 is an equidigital number, since it uses as much as digits as its factorization.

146444581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61440, while the sum is 37.

The square root of 146444581 is about 12101.4288825742. The cubic root of 146444581 is about 527.0976766502.

The spelling of 146444581 in words is "one hundred forty-six million, four hundred forty-four thousand, five hundred eighty-one".