1261222753 has 8 divisors (see below), whose sum is σ = 1441630080. Its totient is φ = 1080873600.

The previous prime is 1261222747. The next prime is 1261222777. The reversal of 1261222753 is 3572221621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1261222753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261222783) 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, 52593 + ... + 72721.

It is an arithmetic number, because the mean of its divisors is an integer number (180203760).

Almost surely, 2^1261222753 is an apocalyptic number.

It is an amenable number.

1261222753 is a deficient number, since it is larger than the sum of its proper divisors (180407327).

1261222753 is an equidigital number, since it uses as much as digits as its factorization.

1261222753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29087.

The product of its digits is 10080, while the sum is 31.

The square root of 1261222753 is about 35513.6981036895. The cubic root of 1261222753 is about 1080.4315699192.

The spelling of 1261222753 in words is "one billion, two hundred sixty-one million, two hundred twenty-two thousand, seven hundred fifty-three".