1266087 has 4 divisors (see below), whose sum is σ = 1688120. Its totient is φ = 844056.

The previous prime is 1266079. The next prime is 1266091. The reversal of 1266087 is 7806621.

It is a happy number.

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

It is not a de Polignac number, because 1266087 - 2³ = 1266079 is a prime.

It is a D-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 (1266047) 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, 211012 + ... + 211017.

It is an arithmetic number, because the mean of its divisors is an integer number (422030).

2^1266087 is an apocalyptic number.

1266087 is a deficient number, since it is larger than the sum of its proper divisors (422033).

1266087 is an equidigital number, since it uses as much as digits as its factorization.

1266087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422032.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 1266087 is about 1125.2053145982. The cubic root of 1266087 is about 108.1818780346.

The spelling of 1266087 in words is "one million, two hundred sixty-six thousand, eighty-seven".