1280837 has 2 divisors, whose sum is σ = 1280838. Its totient is φ = 1280836.

The previous prime is 1280833. The next prime is 1280857. The reversal of 1280837 is 7380821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 763876 + 516961 = 874^2 + 719^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280837 - 2² = 1280833 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640418 + 640419.

It is an arithmetic number, because the mean of its divisors is an integer number (640419).

2^1280837 is an apocalyptic number.

It is an amenable number.

1280837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280837 is an equidigital number, since it uses as much as digits as its factorization.

1280837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1280837 is about 1131.7406946823. The cubic root of 1280837 is about 108.6003658357.

The spelling of 1280837 in words is "one million, two hundred eighty thousand, eight hundred thirty-seven".