1822401 has 12 divisors (see below), whose sum is σ = 3008512. Its totient is φ = 1041336.

The previous prime is 1822393. The next prime is 1822411. The reversal of 1822401 is 1042281.

It is not a de Polignac number, because 1822401 - 2³ = 1822393 is a prime.

It is a super-2 number, since 2×1822401² = 6642290809602, which contains 22 as substring.

It is a Duffinian number.

1822401 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1822411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14401 + ... + 14526.

2^1822401 is an apocalyptic number.

It is an amenable number.

1822401 is a deficient number, since it is larger than the sum of its proper divisors (1186111).

1822401 is a wasteful number, since it uses less digits than its factorization.

1822401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28940 (or 28937 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1822401 is about 1349.9633328354. The cubic root of 1822401 is about 122.1465809590.

Adding to 1822401 its reverse (1042281), we get a palindrome (2864682).

The spelling of 1822401 in words is "one million, eight hundred twenty-two thousand, four hundred one".