1261812484 has 9 divisors (see below), whose sum is σ = 2208296181. Its totient is φ = 630870720.

The previous prime is 1261812481. The next prime is 1261812523. The reversal of 1261812484 is 4842181621.

The square root of 1261812484 is 35522.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 446138884 + 815673600 = 21122^2 + 28560^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261812481) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 62164 + ... + 79924.

Almost surely, 2^1261812484 is an apocalyptic number.

1261812484 is the 35522-nd square number.

It is an amenable number.

1261812484 is a deficient number, since it is larger than the sum of its proper divisors (946483697).

1261812484 is an frugal number, since it uses more digits than its factorization.

1261812484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35526 (or 17763 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The cubic root of 1261812484 is about 1080.5999421608.

The spelling of 1261812484 in words is "one billion, two hundred sixty-one million, eight hundred twelve thousand, four hundred eighty-four".