1294721 has 2 divisors, whose sum is σ = 1294722. Its totient is φ = 1294720.

The previous prime is 1294691. The next prime is 1294723. The reversal of 1294721 is 1274921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1290496 + 4225 = 1136^2 + 65^2 .

It is an emirp because it is prime and its reverse (1274921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1294721 - 2¹⁴ = 1278337 is a prime.

It is a Sophie Germain prime.

Together with 1294723, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1294723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647360 + 647361.

It is an arithmetic number, because the mean of its divisors is an integer number (647361).

2^1294721 is an apocalyptic number.

It is an amenable number.

1294721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1294721 is an equidigital number, since it uses as much as digits as its factorization.

1294721 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 1294721 is about 1137.8580755085. The cubic root of 1294721 is about 108.9913580669.

The spelling of 1294721 in words is "one million, two hundred ninety-four thousand, seven hundred twenty-one".