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1841381 = 4673943

1841381 has 4 divisors (see below), whose sum is σ = 1845792. Its totient is φ = 1836972.

The previous prime is 1841377. The next prime is 1841383. The reversal of 1841381 is 1831481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1841381 - 22 = 1841377 is a prime.

It is a super-2 number, since 2×18413812 = 6781367974322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1841381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1841383) 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, 1505 + ... + 2438.

It is an arithmetic number, because the mean of its divisors is an integer number (461448).

21841381 is an apocalyptic number.

It is an amenable number.

1841381 is a deficient number, since it is larger than the sum of its proper divisors (4411).

1841381 is an equidigital number, since it uses as much as digits as its factorization.

1841381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4410.

The product of its digits is 768, while the sum is 26.

The square root of 1841381 is about 1356.9749444997. The cubic root of 1841381 is about 122.5691626654.

It can be divided in two parts, 1841 and 381, that added together give a palindrome (2222).

The spelling of 1841381 in words is "one million, eight hundred forty-one thousand, three hundred eighty-one".

Divisors: 1 467 3943 1841381