1012255015 has 4 divisors (see below), whose sum is σ = 1214706024. Its totient is φ = 809804008.

The previous prime is 1012254979. The next prime is 1012255019. The reversal of 1012255015 is 5105522101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5105522101 = 149 ⋅34265249.

It is a cyclic number.

It is not a de Polignac number, because 1012255015 - 2¹⁷ = 1012123943 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012255019) 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, 101225497 + ... + 101225506.

It is an arithmetic number, because the mean of its divisors is an integer number (303676506).

Almost surely, 2^1012255015 is an apocalyptic number.

1012255015 is a deficient number, since it is larger than the sum of its proper divisors (202451009).

1012255015 is an equidigital number, since it uses as much as digits as its factorization.

1012255015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202451008.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 1012255015 is about 31815.9553526214. The cubic root of 1012255015 is about 1004.0684304268.

Adding to 1012255015 its reverse (5105522101), we get a palindrome (6117777116).

The spelling of 1012255015 in words is "one billion, twelve million, two hundred fifty-five thousand, fifteen".