145440241 has 4 divisors (see below), whose sum is σ = 146416500. Its totient is φ = 144463984.

The previous prime is 145440221. The next prime is 145440277. The reversal of 145440241 is 142044541.

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 45360225 + 100080016 = 6735^2 + 10004^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145440241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145440221) 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, 487906 + ... + 488203.

It is an arithmetic number, because the mean of its divisors is an integer number (36604125).

Almost surely, 2^145440241 is an apocalyptic number.

It is an amenable number.

145440241 is a deficient number, since it is larger than the sum of its proper divisors (976259).

145440241 is an equidigital number, since it uses as much as digits as its factorization.

145440241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976258.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 145440241 is about 12059.8607371727. The cubic root of 145440241 is about 525.8899385155.

Adding to 145440241 its reverse (142044541), we get a palindrome (287484782).

The spelling of 145440241 in words is "one hundred forty-five million, four hundred forty thousand, two hundred forty-one".