1381289 has 16 divisors (see below), whose sum is σ = 1744512. Its totient is φ = 1064448.

The previous prime is 1381279. The next prime is 1381291. The reversal of 1381289 is 9821831.

It is not a de Polignac number, because 1381289 - 2⁴ = 1381273 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1381229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3737 + ... + 4089.

It is an arithmetic number, because the mean of its divisors is an integer number (109032).

2^1381289 is an apocalyptic number.

It is an amenable number.

1381289 is a deficient number, since it is larger than the sum of its proper divisors (363223).

1381289 is a wasteful number, since it uses less digits than its factorization.

1381289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416.

The product of its digits is 3456, while the sum is 32.

The square root of 1381289 is about 1175.2825192268. The cubic root of 1381289 is about 111.3682813859.

The spelling of 1381289 in words is "one million, three hundred eighty-one thousand, two hundred eighty-nine".