1271711045 has 16 divisors (see below), whose sum is σ = 1722193920. Its totient is φ = 892987200.

The previous prime is 1271711039. The next prime is 1271711057. The reversal of 1271711045 is 5401171721.

It is not a de Polignac number, because 1271711045 - 2²⁰ = 1270662469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 1271710999 and 1271711017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397061 + ... + 400250.

It is an arithmetic number, because the mean of its divisors is an integer number (107637120).

Almost surely, 2^1271711045 is an apocalyptic number.

It is an amenable number.

1271711045 is a deficient number, since it is larger than the sum of its proper divisors (450482875).

1271711045 is a wasteful number, since it uses less digits than its factorization.

1271711045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797356.

The product of its (nonzero) digits is 1960, while the sum is 29.

The square root of 1271711045 is about 35661.0578222240. The cubic root of 1271711045 is about 1083.4182520153.

Adding to 1271711045 its reverse (5401171721), we get a palindrome (6672882766).

The spelling of 1271711045 in words is "one billion, two hundred seventy-one million, seven hundred eleven thousand, forty-five".