1131045023 has 4 divisors (see below), whose sum is σ = 1147926360. Its totient is φ = 1114163688.

The previous prime is 1131045017. The next prime is 1131045029. The reversal of 1131045023 is 3205401311.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1131045017) and next prime (1131045029).

It is a cyclic number.

It is not a de Polignac number, because 1131045023 - 2⁸ = 1131044767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131044986 and 1131045004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131045029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8440568 + ... + 8440701.

It is an arithmetic number, because the mean of its divisors is an integer number (286981590).

Almost surely, 2^1131045023 is an apocalyptic number.

1131045023 is a deficient number, since it is larger than the sum of its proper divisors (16881337).

1131045023 is an equidigital number, since it uses as much as digits as its factorization.

1131045023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16881336.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1131045023 is about 33631.0128155546. The cubic root of 1131045023 is about 1041.9014226001.

Adding to 1131045023 its reverse (3205401311), we get a palindrome (4336446334).

The spelling of 1131045023 in words is "one billion, one hundred thirty-one million, forty-five thousand, twenty-three".