145421241 has 16 divisors (see below), whose sum is σ = 225777024. Its totient is φ = 81529344.

The previous prime is 145421233. The next prime is 145421251. The reversal of 145421241 is 142124541.

It is not a de Polignac number, because 145421241 - 2³ = 145421233 is a prime.

It is a super-2 number, since 2×145421241² = 42294674667960162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145421251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64216 + ... + 66441.

It is an arithmetic number, because the mean of its divisors is an integer number (14111064).

Almost surely, 2^145421241 is an apocalyptic number.

It is an amenable number.

145421241 is a deficient number, since it is larger than the sum of its proper divisors (80355783).

145421241 is a wasteful number, since it uses less digits than its factorization.

145421241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130720.

The product of its digits is 1280, while the sum is 24.

The square root of 145421241 is about 12059.0729743210. The cubic root of 145421241 is about 525.8670371418.

Adding to 145421241 its reverse (142124541), we get a palindrome (287545782).

The spelling of 145421241 in words is "one hundred forty-five million, four hundred twenty-one thousand, two hundred forty-one".