1312233405 has 32 divisors (see below), whose sum is σ = 2420769024. Its totient is φ = 594564096.

The previous prime is 1312233401. The next prime is 1312233449. The reversal of 1312233405 is 5043322131.

It is not a de Polignac number, because 1312233405 - 2² = 1312233401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312233401) 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 31 ways as a sum of consecutive naturals, for example, 43434 + ... + 67163.

It is an arithmetic number, because the mean of its divisors is an integer number (75649032).

Almost surely, 2^1312233405 is an apocalyptic number.

1312233405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312233405 is a deficient number, since it is larger than the sum of its proper divisors (1108535619).

1312233405 is a wasteful number, since it uses less digits than its factorization.

1312233405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110725.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1312233405 is about 36224.7623180608. The cubic root of 1312233405 is about 1094.8056492916.

Adding to 1312233405 its reverse (5043322131), we get a palindrome (6355555536).

The spelling of 1312233405 in words is "one billion, three hundred twelve million, two hundred thirty-three thousand, four hundred five".