1293421 has 2 divisors, whose sum is σ = 1293422. Its totient is φ = 1293420.

The previous prime is 1293419. The next prime is 1293433. The reversal of 1293421 is 1243921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1028196 + 265225 = 1014^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 1293421 - 2¹ = 1293419 is a prime.

Together with 1293419, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1293392 and 1293401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1293401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646710 + 646711.

It is an arithmetic number, because the mean of its divisors is an integer number (646711).

2^1293421 is an apocalyptic number.

It is an amenable number.

1293421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1293421 is an equidigital number, since it uses as much as digits as its factorization.

1293421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 1293421 is about 1137.2866832949. The cubic root of 1293421 is about 108.9548672672.

The spelling of 1293421 in words is "one million, two hundred ninety-three thousand, four hundred twenty-one".