1249986087 has 20 divisors (see below), whose sum is σ = 2134016016. Its totient is φ = 714277440.

The previous prime is 1249986053. The next prime is 1249986097. The reversal of 1249986087 is 7806899421.

1249986087 is a `hidden beast` number, since 1 + 24 + 9 + 9 + 8 + 608 + 7 = 666.

It is not a de Polignac number, because 1249986087 - 2⁷ = 1249985959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249986097) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1101714 + ... + 1102847.

Almost surely, 2^1249986087 is an apocalyptic number.

1249986087 is a deficient number, since it is larger than the sum of its proper divisors (884029929).

1249986087 is an equidigital number, since it uses as much as digits as its factorization.

1249986087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204580 (or 2204571 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The square root of 1249986087 is about 35355.1422992469. The cubic root of 1249986087 is about 1077.2133483811.

The spelling of 1249986087 in words is "one billion, two hundred forty-nine million, nine hundred eighty-six thousand, eighty-seven".