1280977 has 8 divisors (see below), whose sum is σ = 1333800. Its totient is φ = 1229184.

The previous prime is 1280969. The next prime is 1280987. The reversal of 1280977 is 7790821.

It can be written as a sum of positive squares in 4 ways, for example, as 123201 + 1157776 = 351^2 + 1076^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1280977 - 2³ = 1280969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3099 + ... + 3487.

It is an arithmetic number, because the mean of its divisors is an integer number (166725).

2^1280977 is an apocalyptic number.

It is an amenable number.

1280977 is a deficient number, since it is larger than the sum of its proper divisors (52823).

1280977 is an equidigital number, since it uses as much as digits as its factorization.

1280977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 1280977 is about 1131.8025446163. The cubic root of 1280977 is about 108.6043224925.

The spelling of 1280977 in words is "one million, two hundred eighty thousand, nine hundred seventy-seven".