1285142927 has 8 divisors (see below), whose sum is σ = 1296725760. Its totient is φ = 1273611040.

The previous prime is 1285142899. The next prime is 1285142933. The reversal of 1285142927 is 7292415821.

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 1285142927 - 2¹² = 1285138831 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 (1285102927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38873 + ... + 63885.

It is an arithmetic number, because the mean of its divisors is an integer number (162090720).

Almost surely, 2^1285142927 is an apocalyptic number.

1285142927 is a deficient number, since it is larger than the sum of its proper divisors (11582833).

1285142927 is a wasteful number, since it uses less digits than its factorization.

1285142927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25473.

The product of its digits is 80640, while the sum is 41.

The square root of 1285142927 is about 35848.8901780794. The cubic root of 1285142927 is about 1087.2192754422.

The spelling of 1285142927 in words is "one billion, two hundred eighty-five million, one hundred forty-two thousand, nine hundred twenty-seven".