1231434258 has 32 divisors (see below), whose sum is σ = 2543323200. Its totient is φ = 397244736.

The previous prime is 1231434257. The next prime is 1231434271. The reversal of 1231434258 is 8524341321.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1231434257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6228 + ... + 50016.

It is an arithmetic number, because the mean of its divisors is an integer number (79478850).

Almost surely, 2^1231434258 is an apocalyptic number.

1231434258 is an abundant number, since it is smaller than the sum of its proper divisors (1311888942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231434258 is a wasteful number, since it uses less digits than its factorization.

1231434258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43946.

The product of its digits is 23040, while the sum is 33.

The square root of 1231434258 is about 35091.7975886104. The cubic root of 1231434258 is about 1071.8575640793.

Adding to 1231434258 its reverse (8524341321), we get a palindrome (9755775579).

The spelling of 1231434258 in words is "one billion, two hundred thirty-one million, four hundred thirty-four thousand, two hundred fifty-eight".