1279021 has 2 divisors, whose sum is σ = 1279022. Its totient is φ = 1279020.

The previous prime is 1279013. The next prime is 1279027. The reversal of 1279021 is 1209721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1240996 + 38025 = 1114^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 1279021 - 2³ = 1279013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1278983 and 1279001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1279027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639510 + 639511.

It is an arithmetic number, because the mean of its divisors is an integer number (639511).

2^1279021 is an apocalyptic number.

It is an amenable number.

1279021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279021 is an equidigital number, since it uses as much as digits as its factorization.

1279021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1279021 is about 1130.9381061756. The cubic root of 1279021 is about 108.5490161988.

The spelling of 1279021 in words is "one million, two hundred seventy-nine thousand, twenty-one".