1012023865 has 4 divisors (see below), whose sum is σ = 1214428644. Its totient is φ = 809619088.

The previous prime is 1012023827. The next prime is 1012023899. The reversal of 1012023865 is 5683202101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 633176569 + 378847296 = 25163^2 + 19464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012023865 - 2¹³ = 1012015673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 101202382 + ... + 101202391.

It is an arithmetic number, because the mean of its divisors is an integer number (303607161).

Almost surely, 2^1012023865 is an apocalyptic number.

It is an amenable number.

1012023865 is a deficient number, since it is larger than the sum of its proper divisors (202404779).

1012023865 is an equidigital number, since it uses as much as digits as its factorization.

1012023865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202404778.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1012023865 is about 31812.3225338861. The cubic root of 1012023865 is about 1003.9919977484.

Adding to 1012023865 its reverse (5683202101), we get a palindrome (6695225966).

The spelling of 1012023865 in words is "one billion, twelve million, twenty-three thousand, eight hundred sixty-five".