1898081 has 8 divisors (see below), whose sum is σ = 2010720. Its totient is φ = 1786752.

The previous prime is 1898077. The next prime is 1898087. The reversal of 1898081 is 1808981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1898081 - 2² = 1898077 is a prime.

It is a super-2 number, since 2×1898081² = 7205422965122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1898087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5201 + ... + 5553.

It is an arithmetic number, because the mean of its divisors is an integer number (251340).

2^1898081 is an apocalyptic number.

It is an amenable number.

1898081 is a deficient number, since it is larger than the sum of its proper divisors (112639).

1898081 is a wasteful number, since it uses less digits than its factorization.

1898081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 1898081 is about 1377.7086048944. The cubic root of 1898081 is about 123.8145206516.

The spelling of 1898081 in words is "one million, eight hundred ninety-eight thousand, eighty-one".