1381641 has 8 divisors (see below), whose sum is σ = 1950624. Its totient is φ = 866880.

The previous prime is 1381637. The next prime is 1381643. The reversal of 1381641 is 1461831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1381641 - 2² = 1381637 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1381643) 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, 13495 + ... + 13596.

It is an arithmetic number, because the mean of its divisors is an integer number (243828).

2^1381641 is an apocalyptic number.

It is an amenable number.

1381641 is a deficient number, since it is larger than the sum of its proper divisors (568983).

1381641 is a wasteful number, since it uses less digits than its factorization.

1381641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27111.

The product of its digits is 576, while the sum is 24.

The square root of 1381641 is about 1175.4322609151. The cubic root of 1381641 is about 111.3777407401.

The spelling of 1381641 in words is "one million, three hundred eighty-one thousand, six hundred forty-one".