1271421071 has 16 divisors (see below), whose sum is σ = 1348630464. Its totient is φ = 1196135424.

The previous prime is 1271421061. The next prime is 1271421077. The reversal of 1271421071 is 1701241721.

It is a de Polignac number, because none of the positive numbers 2^k-1271421071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1271421071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271421077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766475 + ... + 768131.

It is an arithmetic number, because the mean of its divisors is an integer number (84289404).

Almost surely, 2^1271421071 is an apocalyptic number.

1271421071 is a deficient number, since it is larger than the sum of its proper divisors (77209393).

1271421071 is a wasteful number, since it uses less digits than its factorization.

1271421071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 1271421071 is about 35656.9918949987. The cubic root of 1271421071 is about 1083.3358991866.

Adding to 1271421071 its reverse (1701241721), we get a palindrome (2972662792).

The spelling of 1271421071 in words is "one billion, two hundred seventy-one million, four hundred twenty-one thousand, seventy-one".