1231143026 has 16 divisors (see below), whose sum is σ = 1966278240. Its totient is φ = 576121920.

The previous prime is 1231142999. The next prime is 1231143041. The reversal of 1231143026 is 6203411321.

It is a junction number, because it is equal to n+sod(n) for n = 1231142992 and 1231143010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95060 + ... + 107231.

It is an arithmetic number, because the mean of its divisors is an integer number (122892390).

Almost surely, 2^1231143026 is an apocalyptic number.

1231143026 is a deficient number, since it is larger than the sum of its proper divisors (735135214).

1231143026 is a wasteful number, since it uses less digits than its factorization.

1231143026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202489.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1231143026 is about 35087.6477695499. The cubic root of 1231143026 is about 1071.7730599515.

Adding to 1231143026 its reverse (6203411321), we get a palindrome (7434554347).

The spelling of 1231143026 in words is "one billion, two hundred thirty-one million, one hundred forty-three thousand, twenty-six".