1012861559 has 4 divisors (see below), whose sum is σ = 1012926720. Its totient is φ = 1012796400.

The previous prime is 1012861529. The next prime is 1012861561. The reversal of 1012861559 is 9551682101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1012861559 - 2¹⁶ = 1012796023 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 (1012861529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5834 + ... + 45384.

It is an arithmetic number, because the mean of its divisors is an integer number (253231680).

Almost surely, 2^1012861559 is an apocalyptic number.

1012861559 is a deficient number, since it is larger than the sum of its proper divisors (65161).

1012861559 is an equidigital number, since it uses as much as digits as its factorization.

1012861559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65160.

The product of its (nonzero) digits is 21600, while the sum is 38.

The square root of 1012861559 is about 31825.4859978603. The cubic root of 1012861559 is about 1004.2689365817.

The spelling of 1012861559 in words is "one billion, twelve million, eight hundred sixty-one thousand, five hundred fifty-nine".