1227772141 has 4 divisors (see below), whose sum is σ = 1227866272. Its totient is φ = 1227678012.

The previous prime is 1227772129. The next prime is 1227772151. The reversal of 1227772141 is 1412777221.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1227772141 - 2⁵ = 1227772109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1227772097 and 1227772106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227772111) 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, 23601 + ... + 54886.

It is an arithmetic number, because the mean of its divisors is an integer number (306966568).

Almost surely, 2^1227772141 is an apocalyptic number.

It is an amenable number.

1227772141 is a deficient number, since it is larger than the sum of its proper divisors (94131).

1227772141 is an equidigital number, since it uses as much as digits as its factorization.

1227772141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94130.

The product of its digits is 10976, while the sum is 34.

The square root of 1227772141 is about 35039.5796350356. The cubic root of 1227772141 is about 1070.7939898250.

The spelling of 1227772141 in words is "one billion, two hundred twenty-seven million, seven hundred seventy-two thousand, one hundred forty-one".