1261106088 has 64 divisors (see below), whose sum is σ = 3452267520. Its totient is φ = 380721600.

The previous prime is 1261106083. The next prime is 1261106117. The reversal of 1261106088 is 8806011621.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1261106083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62731 + ... + 80357.

It is an arithmetic number, because the mean of its divisors is an integer number (53941680).

Almost surely, 2^1261106088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1261106088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1726133760).

1261106088 is an abundant number, since it is smaller than the sum of its proper divisors (2191161432).

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

1261106088 is a wasteful number, since it uses less digits than its factorization.

1261106088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17918 (or 17914 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 1261106088 is about 35512.0555304815. The cubic root of 1261106088 is about 1080.3982550440.

The spelling of 1261106088 in words is "one billion, two hundred sixty-one million, one hundred six thousand, eighty-eight".