1271217364 has 18 divisors (see below), whose sum is σ = 2363190830. Its totient is φ = 598219392.

The previous prime is 1271217323. The next prime is 1271217377. The reversal of 1271217364 is 4637121721.

It can be written as a sum of positive squares in 3 ways, for example, as 111133764 + 1160083600 = 10542^2 + 34060^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 548679 + ... + 550990.

Almost surely, 2^1271217364 is an apocalyptic number.

It is an amenable number.

1271217364 is a deficient number, since it is larger than the sum of its proper divisors (1091973466).

1271217364 is a wasteful number, since it uses less digits than its factorization.

1271217364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099707 (or 1099688 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 1271217364 is about 35654.1353001303. The cubic root of 1271217364 is about 1083.2780387609.

The spelling of 1271217364 in words is "one billion, two hundred seventy-one million, two hundred seventeen thousand, three hundred sixty-four".