1312152406 has 4 divisors (see below), whose sum is σ = 1968228612. Its totient is φ = 656076202.

The previous prime is 1312152403. The next prime is 1312152421. The reversal of 1312152406 is 6042512131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312152403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328038100 + ... + 328038103.

It is an arithmetic number, because the mean of its divisors is an integer number (492057153).

Almost surely, 2^1312152406 is an apocalyptic number.

1312152406 is a deficient number, since it is larger than the sum of its proper divisors (656076206).

1312152406 is an equidigital number, since it uses as much as digits as its factorization.

1312152406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656076205.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1312152406 is about 36223.6442948525. The cubic root of 1312152406 is about 1094.7831228145.

Adding to 1312152406 its reverse (6042512131), we get a palindrome (7354664537).

The spelling of 1312152406 in words is "one billion, three hundred twelve million, one hundred fifty-two thousand, four hundred six".