1890541 has 2 divisors, whose sum is σ = 1890542. Its totient is φ = 1890540.

The previous prime is 1890529. The next prime is 1890547. The reversal of 1890541 is 1450981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1334025 + 556516 = 1155^2 + 746^2 .

It is a cyclic number.

It is not a de Polignac number, because 1890541 - 2⁵ = 1890509 is a prime.

It is a Chen prime.

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

It is a pancake number, because a pancake can be divided into 1890541 parts by 1944 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1890547) 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 as a sum of consecutive naturals, namely, 945270 + 945271.

It is an arithmetic number, because the mean of its divisors is an integer number (945271).

2^1890541 is an apocalyptic number.

It is an amenable number.

1890541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890541 is an equidigital number, since it uses as much as digits as its factorization.

1890541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1890541 is about 1374.9694542062. The cubic root of 1890541 is about 123.6503547754.

Adding to 1890541 its product of nonzero digits (1440), we get a palindrome (1891981).

The spelling of 1890541 in words is "one million, eight hundred ninety thousand, five hundred forty-one".