1674821 has 2 divisors, whose sum is σ = 1674822. Its totient is φ = 1674820.

The previous prime is 1674817. The next prime is 1674847. The reversal of 1674821 is 1284761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1653796 + 21025 = 1286^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 1674821 - 2² = 1674817 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 (1604821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 837410 + 837411.

It is an arithmetic number, because the mean of its divisors is an integer number (837411).

2^1674821 is an apocalyptic number.

It is an amenable number.

1674821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1674821 is an equidigital number, since it uses as much as digits as its factorization.

1674821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 29.

The square root of 1674821 is about 1294.1487549737. The cubic root of 1674821 is about 118.7561562829.

The spelling of 1674821 in words is "one million, six hundred seventy-four thousand, eight hundred twenty-one".