1271422361 has 4 divisors (see below), whose sum is σ = 1387006224. Its totient is φ = 1155838500.

The previous prime is 1271422349. The next prime is 1271422381. The reversal of 1271422361 is 1632241721.

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 1271422361 - 2¹⁸ = 1271160217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1271422301) 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, 57791915 + ... + 57791936.

It is an arithmetic number, because the mean of its divisors is an integer number (346751556).

Almost surely, 2^1271422361 is an apocalyptic number.

1271422361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1271422361 is a deficient number, since it is larger than the sum of its proper divisors (115583863).

1271422361 is a wasteful number, since it uses less digits than its factorization.

1271422361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115583862.

The product of its digits is 4032, while the sum is 29.

The square root of 1271422361 is about 35657.0099840130. The cubic root of 1271422361 is about 1083.3362655752.

The spelling of 1271422361 in words is "one billion, two hundred seventy-one million, four hundred twenty-two thousand, three hundred sixty-one".