1973281 has 2 divisors, whose sum is σ = 1973282. Its totient is φ = 1973280.

The previous prime is 1973261. The next prime is 1973287. The reversal of 1973281 is 1823791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1134225 + 839056 = 1065^2 + 916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1973281 is a prime.

It is a super-2 number, since 2×1973281² = 7787675809922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1973287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986640 + 986641.

It is an arithmetic number, because the mean of its divisors is an integer number (986641).

2^1973281 is an apocalyptic number.

It is an amenable number.

1973281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973281 is an equidigital number, since it uses as much as digits as its factorization.

1973281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 31.

The square root of 1973281 is about 1404.7352063645. The cubic root of 1973281 is about 125.4285239259.

The spelling of 1973281 in words is "one million, nine hundred seventy-three thousand, two hundred eighty-one".