1291062870 has 48 divisors (see below), whose sum is σ = 3358648800. Its totient is φ = 344090112.

The previous prime is 1291062869. The next prime is 1291062893. The reversal of 1291062870 is 782601921.

1291062870 is a `hidden beast` number, since 1 + 29 + 1 + 0 + 628 + 7 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236431 + ... + 241829.

It is an arithmetic number, because the mean of its divisors is an integer number (69971850).

Almost surely, 2^1291062870 is an apocalyptic number.

1291062870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1291062870 is an abundant number, since it is smaller than the sum of its proper divisors (2067585930).

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

1291062870 is a wasteful number, since it uses less digits than its factorization.

1291062870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8069 (or 8066 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1291062870 is about 35931.3633195291. The cubic root of 1291062870 is about 1088.8861246903.

The spelling of 1291062870 in words is "one billion, two hundred ninety-one million, sixty-two thousand, eight hundred seventy".