1898401 has 4 divisors (see below), whose sum is σ = 1906992. Its totient is φ = 1889812.

The previous prime is 1898389. The next prime is 1898417. The reversal of 1898401 is 1048981.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1048981 = 347 ⋅3023.

It is a cyclic number.

It is not a de Polignac number, because 1898401 - 2¹¹ = 1896353 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1898431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3955 + ... + 4408.

It is an arithmetic number, because the mean of its divisors is an integer number (476748).

2^1898401 is an apocalyptic number.

It is an amenable number.

1898401 is a deficient number, since it is larger than the sum of its proper divisors (8591).

1898401 is an equidigital number, since it uses as much as digits as its factorization.

1898401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8590.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1898401 is about 1377.8247348629. The cubic root of 1898401 is about 123.8214782789.

The spelling of 1898401 in words is "one million, eight hundred ninety-eight thousand, four hundred one".