1974221 has 2 divisors, whose sum is σ = 1974222. Its totient is φ = 1974220.

The previous prime is 1974163. The next prime is 1974229. The reversal of 1974221 is 1224791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1974025 + 196 = 1405^2 + 14^2 .

It is a cyclic number.

It is not a de Polignac number, because 1974221 - 2¹⁰ = 1973197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987110 + 987111.

It is an arithmetic number, because the mean of its divisors is an integer number (987111).

2^1974221 is an apocalyptic number.

It is an amenable number.

1974221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974221 is an equidigital number, since it uses as much as digits as its factorization.

1974221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 1974221 is about 1405.0697491584. The cubic root of 1974221 is about 125.4484373080.

The spelling of 1974221 in words is "one million, nine hundred seventy-four thousand, two hundred twenty-one".