1312240407 has 8 divisors (see below), whose sum is σ = 1759321200. Its totient is φ = 869993280.

The previous prime is 1312240399. The next prime is 1312240441. The reversal of 1312240407 is 7040422131.

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 1312240407 - 2³ = 1312240399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312240487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207782 + ... + 1208867.

It is an arithmetic number, because the mean of its divisors is an integer number (219915150).

Almost surely, 2^1312240407 is an apocalyptic number.

1312240407 is a deficient number, since it is larger than the sum of its proper divisors (447080793).

1312240407 is a wasteful number, since it uses less digits than its factorization.

1312240407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416833.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1312240407 is about 36224.8589645288. The cubic root of 1312240407 is about 1094.8075965609.

Adding to 1312240407 its reverse (7040422131), we get a palindrome (8352662538).

The spelling of 1312240407 in words is "one billion, three hundred twelve million, two hundred forty thousand, four hundred seven".