1381356 has 18 divisors (see below), whose sum is σ = 3491852. Its totient is φ = 460440.

The previous prime is 1381349. The next prime is 1381381. The reversal of 1381356 is 6531831.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19150 + ... + 19221.

2^1381356 is an apocalyptic number.

It is an amenable number.

1381356 is an abundant number, since it is smaller than the sum of its proper divisors (2110496).

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

1381356 is a wasteful number, since it uses less digits than its factorization.

1381356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38381 (or 38376 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1381356 is about 1175.3110226659. The cubic root of 1381356 is about 111.3700820118.

The spelling of 1381356 in words is "one million, three hundred eighty-one thousand, three hundred fifty-six".