1231132445 has 16 divisors (see below), whose sum is σ = 1506040320. Its totient is φ = 965952000.

The previous prime is 1231132433. The next prime is 1231132453. The reversal of 1231132445 is 5442311321.

It is a happy number.

It is not a de Polignac number, because 1231132445 - 2²⁴ = 1214355229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49325 + ... + 69965.

It is an arithmetic number, because the mean of its divisors is an integer number (94127520).

Almost surely, 2^1231132445 is an apocalyptic number.

It is an amenable number.

1231132445 is a deficient number, since it is larger than the sum of its proper divisors (274907875).

1231132445 is a wasteful number, since it uses less digits than its factorization.

1231132445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20876.

The product of its digits is 2880, while the sum is 26.

The square root of 1231132445 is about 35087.4969896686. The cubic root of 1231132445 is about 1071.7699895086.

Adding to 1231132445 its reverse (5442311321), we get a palindrome (6673443766).

The spelling of 1231132445 in words is "one billion, two hundred thirty-one million, one hundred thirty-two thousand, four hundred forty-five".