1445231481 has 8 divisors (see below), whose sum is σ = 1930121280. Its totient is φ = 961914672.

The previous prime is 1445231477. The next prime is 1445231503. The reversal of 1445231481 is 1841325441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1445231481 - 2² = 1445231477 is a prime.

It is a super-2 number, since 2×1445231481² = 4177388067346906722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1445231471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391101 + ... + 394778.

It is an arithmetic number, because the mean of its divisors is an integer number (241265160).

Almost surely, 2^1445231481 is an apocalyptic number.

It is an amenable number.

1445231481 is a deficient number, since it is larger than the sum of its proper divisors (484889799).

1445231481 is an equidigital number, since it uses as much as digits as its factorization.

1445231481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786495.

The product of its digits is 15360, while the sum is 33.

The square root of 1445231481 is about 38016.2002441065. The cubic root of 1445231481 is about 1130.6090853200.

The spelling of 1445231481 in words is "one billion, four hundred forty-five million, two hundred thirty-one thousand, four hundred eighty-one".