1279961 has 2 divisors, whose sum is σ = 1279962. Its totient is φ = 1279960.

The previous prime is 1279937. The next prime is 1279969. The reversal of 1279961 is 1699721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 913936 + 366025 = 956^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1279961 - 2¹⁸ = 1017817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1279969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639980 + 639981.

It is an arithmetic number, because the mean of its divisors is an integer number (639981).

2^1279961 is an apocalyptic number.

It is an amenable number.

1279961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279961 is an equidigital number, since it uses as much as digits as its factorization.

1279961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 35.

The square root of 1279961 is about 1131.3536140394. The cubic root of 1279961 is about 108.5756019204.

The spelling of 1279961 in words is "one million, two hundred seventy-nine thousand, nine hundred sixty-one".