1882421 has 2 divisors, whose sum is σ = 1882422. Its totient is φ = 1882420.

The previous prime is 1882417. The next prime is 1882429. The reversal of 1882421 is 1242881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1661521 + 220900 = 1289^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1882421 - 2² = 1882417 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1882429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 941210 + 941211.

It is an arithmetic number, because the mean of its divisors is an integer number (941211).

2^1882421 is an apocalyptic number.

It is an amenable number.

1882421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1882421 is an equidigital number, since it uses as much as digits as its factorization.

1882421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1024, while the sum is 26.

The square root of 1882421 is about 1372.0134838988. The cubic root of 1882421 is about 123.4730718716.

The spelling of 1882421 in words is "one million, eight hundred eighty-two thousand, four hundred twenty-one".