145214441 has 4 divisors (see below), whose sum is σ = 145364052. Its totient is φ = 145064832.

The previous prime is 145214437. The next prime is 145214449. The reversal of 145214441 is 144412541.

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 101707225 + 43507216 = 10085^2 + 6596^2 .

It is a cyclic number.

It is not a de Polignac number, because 145214441 - 2² = 145214437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 145214441.

It is not an unprimeable number, because it can be changed into a prime (145214449) 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, 73340 + ... + 75293.

It is an arithmetic number, because the mean of its divisors is an integer number (36341013).

Almost surely, 2^145214441 is an apocalyptic number.

It is an amenable number.

145214441 is a deficient number, since it is larger than the sum of its proper divisors (149611).

145214441 is an equidigital number, since it uses as much as digits as its factorization.

145214441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149610.

The product of its digits is 2560, while the sum is 26.

The square root of 145214441 is about 12050.4954669922. The cubic root of 145214441 is about 525.6176446568.

Adding to 145214441 its reverse (144412541), we get a palindrome (289626982).

The spelling of 145214441 in words is "one hundred forty-five million, two hundred fourteen thousand, four hundred forty-one".