974821 has 2 divisors, whose sum is σ = 974822. Its totient is φ = 974820.

The previous prime is 974819. The next prime is 974837. The reversal of 974821 is 128479.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 893025 + 81796 = 945^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 974821 - 2¹ = 974819 is a prime.

Together with 974819, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (974861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487410 + 487411.

It is an arithmetic number, because the mean of its divisors is an integer number (487411).

2⁹⁷⁴⁸²¹ is an apocalyptic number.

It is an amenable number.

974821 is a deficient number, since it is larger than the sum of its proper divisors (1).

974821 is an equidigital number, since it uses as much as digits as its factorization.

974821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 974821 is about 987.3302385727. The cubic root of 974821 is about 99.1535555327.

The spelling of 974821 in words is "nine hundred seventy-four thousand, eight hundred twenty-one".