1231342134 has 64 divisors (see below), whose sum is σ = 2800631808. Its totient is φ = 357530400.

The previous prime is 1231342127. The next prime is 1231342183. The reversal of 1231342134 is 4312431321.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207817 + ... + 213659.

It is an arithmetic number, because the mean of its divisors is an integer number (43759872).

Almost surely, 2^1231342134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231342134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400315904).

1231342134 is an abundant number, since it is smaller than the sum of its proper divisors (1569289674).

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

1231342134 is a wasteful number, since it uses less digits than its factorization.

1231342134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5993.

The product of its digits is 1728, while the sum is 24.

The square root of 1231342134 is about 35090.4849496270. The cubic root of 1231342134 is about 1071.8308347410.

Adding to 1231342134 its reverse (4312431321), we get a palindrome (5543773455).

The spelling of 1231342134 in words is "one billion, two hundred thirty-one million, three hundred forty-two thousand, one hundred thirty-four".