1285367879 has 8 divisors (see below), whose sum is σ = 1353355440. Its totient is φ = 1217414016.

The previous prime is 1285367821. The next prime is 1285367887. The reversal of 1285367879 is 9787635821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285367879 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 (1285367779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121007 + ... + 131199.

It is an arithmetic number, because the mean of its divisors is an integer number (169169430).

Almost surely, 2^1285367879 is an apocalyptic number.

1285367879 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1285367879 is a deficient number, since it is larger than the sum of its proper divisors (67987561).

1285367879 is a wasteful number, since it uses less digits than its factorization.

1285367879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16849.

The product of its digits is 5080320, while the sum is 56.

The square root of 1285367879 is about 35852.0275437806. The cubic root of 1285367879 is about 1087.2827075261.

The spelling of 1285367879 in words is "one billion, two hundred eighty-five million, three hundred sixty-seven thousand, eight hundred seventy-nine".