1276257 has 4 divisors (see below), whose sum is σ = 1701680. Its totient is φ = 850836.

The previous prime is 1276243. The next prime is 1276271. The reversal of 1276257 is 7526721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1276243) and next prime (1276271).

It is not a de Polignac number, because 1276257 - 2⁶ = 1276193 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1276237) 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 3 ways as a sum of consecutive naturals, for example, 212707 + ... + 212712.

It is an arithmetic number, because the mean of its divisors is an integer number (425420).

2^1276257 is an apocalyptic number.

It is an amenable number.

1276257 is a deficient number, since it is larger than the sum of its proper divisors (425423).

1276257 is an equidigital number, since it uses as much as digits as its factorization.

1276257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425422.

The product of its digits is 5880, while the sum is 30.

The square root of 1276257 is about 1129.7154508990. The cubic root of 1276257 is about 108.4707673234.

The spelling of 1276257 in words is "one million, two hundred seventy-six thousand, two hundred fifty-seven".