1271252213 has 8 divisors (see below), whose sum is σ = 1584937920. Its totient is φ = 990586080.

The previous prime is 1271252141. The next prime is 1271252219. The reversal of 1271252213 is 3122521721.

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

It is not a de Polignac number, because 1271252213 - 2¹⁶ = 1271186677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271252219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8254808 + ... + 8254961.

It is an arithmetic number, because the mean of its divisors is an integer number (198117240).

Almost surely, 2^1271252213 is an apocalyptic number.

It is an amenable number.

1271252213 is a deficient number, since it is larger than the sum of its proper divisors (313685707).

1271252213 is a wasteful number, since it uses less digits than its factorization.

1271252213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16509787.

The product of its digits is 1680, while the sum is 26.

The square root of 1271252213 is about 35654.6240058705. The cubic root of 1271252213 is about 1083.2879376218.

Adding to 1271252213 its reverse (3122521721), we get a palindrome (4393773934).

The spelling of 1271252213 in words is "one billion, two hundred seventy-one million, two hundred fifty-two thousand, two hundred thirteen".