1445221149 has 16 divisors (see below), whose sum is σ = 2052825600. Its totient is φ = 901771056.

The previous prime is 1445221097. The next prime is 1445221157. The reversal of 1445221149 is 9411225441.

It is not a de Polignac number, because 1445221149 - 2²⁰ = 1444172573 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445221159) 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, 148009 + ... + 157470.

It is an arithmetic number, because the mean of its divisors is an integer number (128301600).

Almost surely, 2^1445221149 is an apocalyptic number.

1445221149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1445221149 is a deficient number, since it is larger than the sum of its proper divisors (607604451).

1445221149 is a wasteful number, since it uses less digits than its factorization.

1445221149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305584.

The product of its digits is 11520, while the sum is 33.

The square root of 1445221149 is about 38016.0643544279. The cubic root of 1445221149 is about 1130.6063910616.

The spelling of 1445221149 in words is "one billion, four hundred forty-five million, two hundred twenty-one thousand, one hundred forty-nine".