145522241 has 4 divisors (see below), whose sum is σ = 145623984. Its totient is φ = 145420500.

The previous prime is 145522231. The next prime is 145522283. The reversal of 145522241 is 142225541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145522241 - 2²² = 141327937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145522241.

It is not an unprimeable number, because it can be changed into a prime (145522231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48695 + ... + 51596.

It is an arithmetic number, because the mean of its divisors is an integer number (36405996).

Almost surely, 2^145522241 is an apocalyptic number.

It is an amenable number.

145522241 is a deficient number, since it is larger than the sum of its proper divisors (101743).

145522241 is a wasteful number, since it uses less digits than its factorization.

145522241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101742.

The product of its digits is 3200, while the sum is 26.

The square root of 145522241 is about 12063.2599656975. The cubic root of 145522241 is about 525.9887531510.

Adding to 145522241 its reverse (142225541), we get a palindrome (287747782).

It can be divided in two parts, 14 and 5522241, that added together give a palindrome (5522255).

The spelling of 145522241 in words is "one hundred forty-five million, five hundred twenty-two thousand, two hundred forty-one".