145990241 has 4 divisors (see below), whose sum is σ = 146229012. Its totient is φ = 145751472.

The previous prime is 145990219. The next prime is 145990259. The reversal of 145990241 is 142099541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26306641 + 119683600 = 5129^2 + 10940^2 .

It is a cyclic number.

It is not a de Polignac number, because 145990241 - 2²² = 141795937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145990261) 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, 118466 + ... + 119691.

It is an arithmetic number, because the mean of its divisors is an integer number (36557253).

Almost surely, 2^145990241 is an apocalyptic number.

It is an amenable number.

145990241 is a deficient number, since it is larger than the sum of its proper divisors (238771).

145990241 is an equidigital number, since it uses as much as digits as its factorization.

145990241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238770.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 145990241 is about 12082.6421365527. The cubic root of 145990241 is about 526.5520102827.

The spelling of 145990241 in words is "one hundred forty-five million, nine hundred ninety thousand, two hundred forty-one".