1261106160 has 80 divisors (see below), whose sum is σ = 3967829376. Its totient is φ = 331271424.

The previous prime is 1261106153. The next prime is 1261106207. The reversal of 1261106160 is 616011621.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1261106160.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23134 + ... + 55293.

Almost surely, 2^1261106160 is an apocalyptic number.

1261106160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1261106160 is an abundant number, since it is smaller than the sum of its proper divisors (2706723216).

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

1261106160 is a wasteful number, since it uses less digits than its factorization.

1261106160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78510 (or 78504 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1261106160 is about 35512.0565442217. The cubic root of 1261106160 is about 1080.3982756049.

Adding to 1261106160 its reverse (616011621), we get a palindrome (1877117781).

The spelling of 1261106160 in words is "one billion, two hundred sixty-one million, one hundred six thousand, one hundred sixty".