1171297451 has 2 divisors, whose sum is σ = 1171297452. Its totient is φ = 1171297450.

The previous prime is 1171297447. The next prime is 1171297469. The reversal of 1171297451 is 1547921711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1171297451 - 2² = 1171297447 is a prime.

It is not a weakly prime, because it can be changed into another prime (1171290451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585648725 + 585648726.

It is an arithmetic number, because the mean of its divisors is an integer number (585648726).

Almost surely, 2^1171297451 is an apocalyptic number.

1171297451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171297451 is an equidigital number, since it uses as much as digits as its factorization.

1171297451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 38.

The square root of 1171297451 is about 34224.2231613809. The cubic root of 1171297451 is about 1054.1176036310.

The spelling of 1171297451 in words is "one billion, one hundred seventy-one million, two hundred ninety-seven thousand, four hundred fifty-one".