1312147 has 4 divisors (see below), whose sum is σ = 1328040. Its totient is φ = 1296256.

The previous prime is 1312139. The next prime is 1312153. The reversal of 1312147 is 7412131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312147 - 2³ = 1312139 is a prime.

It is a Duffinian number.

1312147 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1312177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7822 + ... + 7987.

It is an arithmetic number, because the mean of its divisors is an integer number (332010).

2^1312147 is an apocalyptic number.

1312147 is a deficient number, since it is larger than the sum of its proper divisors (15893).

1312147 is an equidigital number, since it uses as much as digits as its factorization.

1312147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15892.

The product of its digits is 168, while the sum is 19.

The square root of 1312147 is about 1145.4898515482. The cubic root of 1312147 is about 109.4781619329.

Adding to 1312147 its reverse (7412131), we get a palindrome (8724278).

It can be divided in two parts, 131 and 2147, that added together give a triangular number (2278 = T₆₇).

The spelling of 1312147 in words is "one million, three hundred twelve thousand, one hundred forty-seven".