1311878 has 8 divisors (see below), whose sum is σ = 1973160. Its totient is φ = 654160.

The previous prime is 1311857. The next prime is 1311899. The reversal of 1311878 is 8781131.

It is an interprime number because it is at equal distance from previous prime (1311857) and next prime (1311899).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413 + ... + 1671.

It is an arithmetic number, because the mean of its divisors is an integer number (246645).

2^1311878 is an apocalyptic number.

1311878 is a deficient number, since it is larger than the sum of its proper divisors (661282).

1311878 is a wasteful number, since it uses less digits than its factorization.

1311878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782.

The product of its digits is 1344, while the sum is 29.

The square root of 1311878 is about 1145.3724285140. The cubic root of 1311878 is about 109.4706801395.

The spelling of 1311878 in words is "one million, three hundred eleven thousand, eight hundred seventy-eight".