1266867487 has 4 divisors (see below), whose sum is σ = 1297766736. Its totient is φ = 1235968240.

The previous prime is 1266867479. The next prime is 1266867499. The reversal of 1266867487 is 7847686621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7847686621 = 8369 ⋅937709.

It is a cyclic number.

It is not a de Polignac number, because 1266867487 - 2³ = 1266867479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266867467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15449563 + ... + 15449644.

It is an arithmetic number, because the mean of its divisors is an integer number (324441684).

Almost surely, 2^1266867487 is an apocalyptic number.

1266867487 is a deficient number, since it is larger than the sum of its proper divisors (30899249).

1266867487 is an equidigital number, since it uses as much as digits as its factorization.

1266867487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30899248.

The product of its digits is 5419008, while the sum is 55.

The square root of 1266867487 is about 35593.0820104132. The cubic root of 1266867487 is about 1082.0410325960.

The spelling of 1266867487 in words is "one billion, two hundred sixty-six million, eight hundred sixty-seven thousand, four hundred eighty-seven".