8131445 has 16 divisors (see below), whose sum is σ = 11199360. Its totient is φ = 5552064.

The previous prime is 8131421. The next prime is 8131463. The reversal of 8131445 is 5441318.

It is not a de Polignac number, because 8131445 - 2¹⁶ = 8065909 is a prime.

It is a super-2 number, since 2×8131445² = 132240795576050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12959 + ... + 13571.

It is an arithmetic number, because the mean of its divisors is an integer number (699960).

Almost surely, 2^8131445 is an apocalyptic number.

It is an amenable number.

8131445 is a deficient number, since it is larger than the sum of its proper divisors (3067915).

8131445 is a wasteful number, since it uses less digits than its factorization.

8131445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004.

The product of its digits is 1920, while the sum is 26.

The square root of 8131445 is about 2851.5688664312. The cubic root of 8131445 is about 201.0894299371.

The spelling of 8131445 in words is "eight million, one hundred thirty-one thousand, four hundred forty-five".