1381264 has 20 divisors (see below), whose sum is σ = 2700720. Its totient is φ = 684320.

The previous prime is 1381231. The next prime is 1381271. The reversal of 1381264 is 4621831.

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, 1767 + ... + 2425.

It is an arithmetic number, because the mean of its divisors is an integer number (135036).

2^1381264 is an apocalyptic number.

It is an amenable number.

1381264 is a deficient number, since it is larger than the sum of its proper divisors (1319456).

1381264 is a wasteful number, since it uses less digits than its factorization.

1381264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 792 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 1381264 is about 1175.2718834380. The cubic root of 1381264 is about 111.3676094956.

The spelling of 1381264 in words is "one million, three hundred eighty-one thousand, two hundred sixty-four".