1012081266 has 72 divisors (see below), whose sum is σ = 2595775104. Its totient is φ = 279165600.

The previous prime is 1012081253. The next prime is 1012081267. The reversal of 1012081266 is 6621802101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012081267) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 101191 + ... + 110741.

It is an arithmetic number, because the mean of its divisors is an integer number (36052432).

Almost surely, 2^1012081266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012081266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1297887552).

1012081266 is an abundant number, since it is smaller than the sum of its proper divisors (1583693838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1012081266 is a wasteful number, since it uses less digits than its factorization.

1012081266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9624 (or 9592 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1012081266 is about 31813.2247029439. The cubic root of 1012081266 is about 1004.0109792030.

Adding to 1012081266 its reverse (6621802101), we get a palindrome (7633883367).

The spelling of 1012081266 in words is "one billion, twelve million, eighty-one thousand, two hundred sixty-six".