1291131210 has 16 divisors (see below), whose sum is σ = 3098714976. Its totient is φ = 344301648.

The previous prime is 1291131167. The next prime is 1291131211. The reversal of 1291131210 is 121311921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1291131211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21518824 + ... + 21518883.

It is an arithmetic number, because the mean of its divisors is an integer number (193669686).

Almost surely, 2^1291131210 is an apocalyptic number.

1291131210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1291131210 is an abundant number, since it is smaller than the sum of its proper divisors (1807583766).

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

1291131210 is a wasteful number, since it uses less digits than its factorization.

1291131210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43037717.

The product of its (nonzero) digits is 108, while the sum is 21.

The square root of 1291131210 is about 35932.3142867253. The cubic root of 1291131210 is about 1088.9053370686.

The spelling of 1291131210 in words is "one billion, two hundred ninety-one million, one hundred thirty-one thousand, two hundred ten".