1231235423 has 8 divisors (see below), whose sum is σ = 1365932160. Its totient is φ = 1100333080.

The previous prime is 1231235417. The next prime is 1231235437. The reversal of 1231235423 is 3245321321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231235423 - 2¹⁰ = 1231234399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231235392 and 1231235401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231235023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947915 + ... + 949212.

It is an arithmetic number, because the mean of its divisors is an integer number (170741520).

Almost surely, 2^1231235423 is an apocalyptic number.

1231235423 is a deficient number, since it is larger than the sum of its proper divisors (134696737).

1231235423 is a wasteful number, since it uses less digits than its factorization.

1231235423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897197.

The product of its digits is 4320, while the sum is 26.

The square root of 1231235423 is about 35088.9644047812. The cubic root of 1231235423 is about 1071.7998713877.

Adding to 1231235423 its reverse (3245321321), we get a palindrome (4476556744).

The spelling of 1231235423 in words is "one billion, two hundred thirty-one million, two hundred thirty-five thousand, four hundred twenty-three".