1471171157 has 4 divisors (see below), whose sum is σ = 1487701260. Its totient is φ = 1454641056.

The previous prime is 1471171139. The next prime is 1471171181. The reversal of 1471171157 is 7511711741.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7511711741 = 131 ⋅57341311.

It can be written as a sum of positive squares in 2 ways, for example, as 85396081 + 1385775076 = 9241^2 + 37226^2 .

It is a cyclic number.

It is not a de Polignac number, because 1471171157 - 2¹⁶ = 1471105621 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 (1471171127) 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, 8264918 + ... + 8265095.

It is an arithmetic number, because the mean of its divisors is an integer number (371925315).

Almost surely, 2^1471171157 is an apocalyptic number.

It is an amenable number.

1471171157 is a deficient number, since it is larger than the sum of its proper divisors (16530103).

1471171157 is an equidigital number, since it uses as much as digits as its factorization.

1471171157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16530102.

The product of its digits is 6860, while the sum is 35.

The square root of 1471171157 is about 38355.8490585204. The cubic root of 1471171157 is about 1137.3332446773. Note that the first 3 decimals are identical.

Adding to 1471171157 its reverse (7511711741), we get a palindrome (8982882898).

The spelling of 1471171157 in words is "one billion, four hundred seventy-one million, one hundred seventy-one thousand, one hundred fifty-seven".