1311378 has 16 divisors (see below), whose sum is σ = 2666496. Its totient is φ = 429840.

The previous prime is 1311377. The next prime is 1311383. The reversal of 1311378 is 8731131.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1311377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1426 + ... + 2157.

It is an arithmetic number, because the mean of its divisors is an integer number (166656).

2^1311378 is an apocalyptic number.

1311378 is an abundant number, since it is smaller than the sum of its proper divisors (1355118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311378 is a wasteful number, since it uses less digits than its factorization.

1311378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649.

The product of its digits is 504, while the sum is 24.

The square root of 1311378 is about 1145.1541380967. The cubic root of 1311378 is about 109.4567707426.

The spelling of 1311378 in words is "one million, three hundred eleven thousand, three hundred seventy-eight".