1312742 has 4 divisors (see below), whose sum is σ = 1969116. Its totient is φ = 656370.

The previous prime is 1312739. The next prime is 1312769. The reversal of 1312742 is 2472131.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328184 + ... + 328187.

It is an arithmetic number, because the mean of its divisors is an integer number (492279).

2^1312742 is an apocalyptic number.

1312742 is a deficient number, since it is larger than the sum of its proper divisors (656374).

1312742 is an equidigital number, since it uses as much as digits as its factorization.

1312742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656373.

The product of its digits is 336, while the sum is 20.

The square root of 1312742 is about 1145.7495363298. The cubic root of 1312742 is about 109.4947072496.

Adding to 1312742 its reverse (2472131), we get a palindrome (3784873).

The spelling of 1312742 in words is "one million, three hundred twelve thousand, seven hundred forty-two".