1200910491 has 12 divisors (see below), whose sum is σ = 1892343960. Its totient is φ = 727824480.

The previous prime is 1200910441. The next prime is 1200910507. The reversal of 1200910491 is 1940190021.

It is not a de Polignac number, because 1200910491 - 2⁹ = 1200909979 is a prime.

It is a super-2 number, since 2×1200910491² = 2884372014787722162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1200910421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6065106 + ... + 6065303.

It is an arithmetic number, because the mean of its divisors is an integer number (157695330).

Almost surely, 2^1200910491 is an apocalyptic number.

1200910491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200910491 is a deficient number, since it is larger than the sum of its proper divisors (691433469).

1200910491 is a wasteful number, since it uses less digits than its factorization.

1200910491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12130426 (or 12130423 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1200910491 is about 34654.1554651098. The cubic root of 1200910491 is about 1062.9272626442.

It can be divided in two parts, 12009 and 10491, that added together give a square (22500 = 150²).

The spelling of 1200910491 in words is "one billion, two hundred million, nine hundred ten thousand, four hundred ninety-one".