1890241 has 2 divisors, whose sum is σ = 1890242. Its totient is φ = 1890240.

The previous prime is 1890227. The next prime is 1890257. The reversal of 1890241 is 1420981.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1440000 + 450241 = 1200^2 + 671^2 .

It is an emirp because it is prime and its reverse (1420981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1890241 - 2⁷ = 1890113 is a prime.

It is a super-2 number, since 2×1890241² = 7146022076162, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1890211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945120 + 945121.

It is an arithmetic number, because the mean of its divisors is an integer number (945121).

2^1890241 is an apocalyptic number.

It is an amenable number.

1890241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890241 is an equidigital number, since it uses as much as digits as its factorization.

1890241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1890241 is about 1374.8603565453. The cubic root of 1890241 is about 123.6438139548.

The spelling of 1890241 in words is "one million, eight hundred ninety thousand, two hundred forty-one".