1131404043 has 32 divisors (see below), whose sum is σ = 1991416320. Its totient is φ = 553167360.

The previous prime is 1131403991. The next prime is 1131404051. The reversal of 1131404043 is 3404041311.

It is not a de Polignac number, because 1131404043 - 2¹⁰ = 1131403019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1131404243) 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, 140128 + ... + 147981.

It is an arithmetic number, because the mean of its divisors is an integer number (62231760).

Almost surely, 2^1131404043 is an apocalyptic number.

1131404043 is a deficient number, since it is larger than the sum of its proper divisors (860012277).

1131404043 is a wasteful number, since it uses less digits than its factorization.

1131404043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288147.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1131404043 is about 33636.3500249358. The cubic root of 1131404043 is about 1042.0116521870.

Adding to 1131404043 its reverse (3404041311), we get a palindrome (4535445354).

The spelling of 1131404043 in words is "one billion, one hundred thirty-one million, four hundred four thousand, forty-three".