1261227241 has 4 divisors (see below), whose sum is σ = 1316063232. Its totient is φ = 1206391252.

The previous prime is 1261227217. The next prime is 1261227257. The reversal of 1261227241 is 1427221621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1261227241 - 2¹¹ = 1261225193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261227211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27417961 + ... + 27418006.

It is an arithmetic number, because the mean of its divisors is an integer number (329015808).

Almost surely, 2^1261227241 is an apocalyptic number.

It is an amenable number.

1261227241 is a deficient number, since it is larger than the sum of its proper divisors (54835991).

1261227241 is an equidigital number, since it uses as much as digits as its factorization.

1261227241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54835990.

The product of its digits is 2688, while the sum is 28.

The square root of 1261227241 is about 35513.7612905195. The cubic root of 1261227241 is about 1080.4328514721.

Adding to 1261227241 its reverse (1427221621), we get a palindrome (2688448862).

The spelling of 1261227241 in words is "one billion, two hundred sixty-one million, two hundred twenty-seven thousand, two hundred forty-one".