1249492587 has 16 divisors (see below), whose sum is σ = 1905027072. Its totient is φ = 713606400.

The previous prime is 1249492499. The next prime is 1249492597. The reversal of 1249492587 is 7852949421.

It is not a de Polignac number, because 1249492587 - 2¹⁰ = 1249491563 is a prime.

It is a super-2 number, since 2×1249492587² = 3122463449935905138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1249492597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25723 + ... + 56219.

It is an arithmetic number, because the mean of its divisors is an integer number (119064192).

Almost surely, 2^1249492587 is an apocalyptic number.

1249492587 is a deficient number, since it is larger than the sum of its proper divisors (655534485).

1249492587 is a wasteful number, since it uses less digits than its factorization.

1249492587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32458.

The product of its digits is 1451520, while the sum is 51.

The square root of 1249492587 is about 35348.1624274869. The cubic root of 1249492587 is about 1077.0715668663.

The spelling of 1249492587 in words is "one billion, two hundred forty-nine million, four hundred ninety-two thousand, five hundred eighty-seven".