1638341 has 6 divisors (see below), whose sum is σ = 1740690. Its totient is φ = 1541696.

The previous prime is 1638331. The next prime is 1638347. The reversal of 1638341 is 1438361.

It can be written as a sum of positive squares in 3 ways, for example, as 450241 + 1188100 = 671^2 + 1090^2 .

It is not a de Polignac number, because 1638341 - 2¹⁸ = 1376197 is a prime.

It is a super-2 number, since 2×1638341² = 5368322464562, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 1638341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1638347) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2546 + ... + 3123.

It is an arithmetic number, because the mean of its divisors is an integer number (290115).

2^1638341 is an apocalyptic number.

It is an amenable number.

1638341 is a deficient number, since it is larger than the sum of its proper divisors (102349).

1638341 is an equidigital number, since it uses as much as digits as its factorization.

1638341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5703 (or 5686 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 1638341 is about 1279.9769529175. The cubic root of 1638341 is about 117.8875928493.

The spelling of 1638341 in words is "one million, six hundred thirty-eight thousand, three hundred forty-one".