1898101 has 4 divisors (see below), whose sum is σ = 2009772. Its totient is φ = 1786432.

The previous prime is 1898087. The next prime is 1898107. The reversal of 1898101 is 1018981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1134225 + 763876 = 1065^2 + 874^2 .

It is a cyclic number.

It is not a de Polignac number, because 1898101 - 2⁵ = 1898069 is a prime.

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

It is a Duffinian number.

1898101 is a lucky number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 1898101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1898107) 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, 55810 + ... + 55843.

It is an arithmetic number, because the mean of its divisors is an integer number (502443).

2^1898101 is an apocalyptic number.

It is an amenable number.

1898101 is a deficient number, since it is larger than the sum of its proper divisors (111671).

1898101 is a wasteful number, since it uses less digits than its factorization.

1898101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111670.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 1898101 is about 1377.7158633042. The cubic root of 1898101 is about 123.8149555262.

The spelling of 1898101 in words is "one million, eight hundred ninety-eight thousand, one hundred one".