1265287 has 4 divisors (see below), whose sum is σ = 1292256. Its totient is φ = 1238320.

The previous prime is 1265281. The next prime is 1265311. The reversal of 1265287 is 7825621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1265287 - 2³ = 1265279 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265281) 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, 13414 + ... + 13507.

It is an arithmetic number, because the mean of its divisors is an integer number (323064).

2^1265287 is an apocalyptic number.

1265287 is a deficient number, since it is larger than the sum of its proper divisors (26969).

1265287 is an equidigital number, since it uses as much as digits as its factorization.

1265287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26968.

The product of its digits is 6720, while the sum is 31.

The square root of 1265287 is about 1124.8497677468. The cubic root of 1265287 is about 108.1590876742.

The spelling of 1265287 in words is "one million, two hundred sixty-five thousand, two hundred eighty-seven".