1131423245 has 32 divisors (see below), whose sum is σ = 1453427712. Its totient is φ = 843538432.

The previous prime is 1131423239. The next prime is 1131423247. The reversal of 1131423245 is 5423241311.

It is a happy number.

It is not a de Polignac number, because 1131423245 - 2⁸ = 1131422989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131423247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1907669 + ... + 1908261.

It is an arithmetic number, because the mean of its divisors is an integer number (45419616).

Almost surely, 2^1131423245 is an apocalyptic number.

It is an amenable number.

1131423245 is a deficient number, since it is larger than the sum of its proper divisors (322004467).

1131423245 is a wasteful number, since it uses less digits than its factorization.

1131423245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021.

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

The square root of 1131423245 is about 33636.6354589754. The cubic root of 1131423245 is about 1042.0175471028.

Adding to 1131423245 its reverse (5423241311), we get a palindrome (6554664556).

The spelling of 1131423245 in words is "one billion, one hundred thirty-one million, four hundred twenty-three thousand, two hundred forty-five".