1247171497 has 24 divisors (see below), whose sum is σ = 1509284448. Its totient is φ = 1020988800.

The previous prime is 1247171479. The next prime is 1247171501. The reversal of 1247171497 is 7941717421.

It is not a de Polignac number, because 1247171497 - 2²⁷ = 1112953769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1247171437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68038 + ... + 84400.

It is an arithmetic number, because the mean of its divisors is an integer number (62886852).

Almost surely, 2^1247171497 is an apocalyptic number.

It is an amenable number.

1247171497 is a deficient number, since it is larger than the sum of its proper divisors (262112951).

1247171497 is a wasteful number, since it uses less digits than its factorization.

1247171497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16441 (or 16428 counting only the distinct ones).

The product of its digits is 98784, while the sum is 43.

The square root of 1247171497 is about 35315.3153320199. The cubic root of 1247171497 is about 1076.4042213966.

The spelling of 1247171497 in words is "one billion, two hundred forty-seven million, one hundred seventy-one thousand, four hundred ninety-seven".