1312243023 has 16 divisors (see below), whose sum is σ = 2153424896. Its totient is φ = 692172000.

The previous prime is 1312243019. The next prime is 1312243027. The reversal of 1312243023 is 3203422131.

It is an interprime number because it is at equal distance from previous prime (1312243019) and next prime (1312243027).

It is not a de Polignac number, because 1312243023 - 2² = 1312243019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312243027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2403103 + ... + 2403648.

It is an arithmetic number, because the mean of its divisors is an integer number (134589056).

Almost surely, 2^1312243023 is an apocalyptic number.

1312243023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1312243023 is a deficient number, since it is larger than the sum of its proper divisors (841181873).

1312243023 is a wasteful number, since it uses less digits than its factorization.

1312243023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806774.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1312243023 is about 36224.8950723118. The cubic root of 1312243023 is about 1094.8083240737.

Adding to 1312243023 its reverse (3203422131), we get a palindrome (4515665154).

The spelling of 1312243023 in words is "one billion, three hundred twelve million, two hundred forty-three thousand, twenty-three".