1381188 has 12 divisors (see below), whose sum is σ = 3222800. Its totient is φ = 460392.

The previous prime is 1381187. The next prime is 1381207. The reversal of 1381188 is 8811831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1381187) 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, 57538 + ... + 57561.

2^1381188 is an apocalyptic number.

It is an amenable number.

1381188 is an abundant number, since it is smaller than the sum of its proper divisors (1841612).

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

1381188 is a wasteful number, since it uses less digits than its factorization.

1381188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115106 (or 115104 counting only the distinct ones).

The product of its digits is 1536, while the sum is 30.

The square root of 1381188 is about 1175.2395500493. The cubic root of 1381188 is about 111.3655668995.

It can be divided in two parts, 138 and 1188, that added together give a triangular number (1326 = T₅₁).

The spelling of 1381188 in words is "one million, three hundred eighty-one thousand, one hundred eighty-eight".