1445003253 has 16 divisors (see below), whose sum is σ = 2156376960. Its totient is φ = 956301408.

The previous prime is 1445003249. The next prime is 1445003269. The reversal of 1445003253 is 3523005441.

It is not a de Polignac number, because 1445003253 - 2² = 1445003249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445003233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191625 + ... + 199022.

It is an arithmetic number, because the mean of its divisors is an integer number (134773560).

Almost surely, 2^1445003253 is an apocalyptic number.

It is an amenable number.

1445003253 is a deficient number, since it is larger than the sum of its proper divisors (711373707).

1445003253 is a wasteful number, since it uses less digits than its factorization.

1445003253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390793 (or 390787 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 1445003253 is about 38013.1984052908. The cubic root of 1445003253 is about 1130.5495676953.

Adding to 1445003253 its reverse (3523005441), we get a palindrome (4968008694).

The spelling of 1445003253 in words is "one billion, four hundred forty-five million, three thousand, two hundred fifty-three".