1231456523 has 8 divisors (see below), whose sum is σ = 1422431280. Its totient is φ = 1053652480.

The previous prime is 1231456517. The next prime is 1231456531. The reversal of 1231456523 is 3256541321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1231456523 - 2⁴ = 1231456507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231456523.

It is not an unprimeable number, because it can be changed into a prime (1231456573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3292478 + ... + 3292851.

It is an arithmetic number, because the mean of its divisors is an integer number (177803910).

Almost surely, 2^1231456523 is an apocalyptic number.

1231456523 is a deficient number, since it is larger than the sum of its proper divisors (190974757).

1231456523 is a wasteful number, since it uses less digits than its factorization.

1231456523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6585357.

The product of its digits is 21600, while the sum is 32.

The square root of 1231456523 is about 35092.1148265533. The cubic root of 1231456523 is about 1071.8640239626.

Adding to 1231456523 its reverse (3256541321), we get a palindrome (4487997844).

It can be divided in two parts, 1231 and 456523, that added together give a palindrome (457754).

The spelling of 1231456523 in words is "one billion, two hundred thirty-one million, four hundred fifty-six thousand, five hundred twenty-three".