1293278587 has 8 divisors (see below), whose sum is σ = 1374197616. Its totient is φ = 1212897792.

The previous prime is 1293278579. The next prime is 1293278603. The reversal of 1293278587 is 7858723921.

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

It is a cyclic number.

It is not a de Polignac number, because 1293278587 - 2³ = 1293278579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1293278537) 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 7 ways as a sum of consecutive naturals, for example, 129598 + ... + 139219.

It is an arithmetic number, because the mean of its divisors is an integer number (171774702).

Almost surely, 2^1293278587 is an apocalyptic number.

1293278587 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1293278587 is a deficient number, since it is larger than the sum of its proper divisors (80919029).

1293278587 is a wasteful number, since it uses less digits than its factorization.

1293278587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269117.

The product of its digits is 1693440, while the sum is 52.

The square root of 1293278587 is about 35962.1827340889. The cubic root of 1293278587 is about 1089.5086827047.

It can be divided in two parts, 12932 and 78587, that added together give a palindrome (91519).

The spelling of 1293278587 in words is "one billion, two hundred ninety-three million, two hundred seventy-eight thousand, five hundred eighty-seven".