1293246987 has 8 divisors (see below), whose sum is σ = 1745104704. Its totient is φ = 851776968.

The previous prime is 1293246947. The next prime is 1293247003. The reversal of 1293246987 is 7896423921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1293246987 - 2³⁰ = 219505163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1293246947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2596633 + ... + 2597130.

It is an arithmetic number, because the mean of its divisors is an integer number (218138088).

Almost surely, 2^1293246987 is an apocalyptic number.

1293246987 is a deficient number, since it is larger than the sum of its proper divisors (451857717).

1293246987 is an equidigital number, since it uses as much as digits as its factorization.

1293246987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193849.

The product of its digits is 1306368, while the sum is 51.

The square root of 1293246987 is about 35961.7433809875. The cubic root of 1293246987 is about 1089.4998089387.

The spelling of 1293246987 in words is "one billion, two hundred ninety-three million, two hundred forty-six thousand, nine hundred eighty-seven".