1166254391 has 2 divisors, whose sum is σ = 1166254392. Its totient is φ = 1166254390.

The previous prime is 1166254387. The next prime is 1166254423. The reversal of 1166254391 is 1934526611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1166254391 - 2² = 1166254387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166254321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583127195 + 583127196.

It is an arithmetic number, because the mean of its divisors is an integer number (583127196).

Almost surely, 2^1166254391 is an apocalyptic number.

1166254391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166254391 is an equidigital number, since it uses as much as digits as its factorization.

1166254391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 1166254391 is about 34150.4669221374. The cubic root of 1166254391 is about 1052.6025811253.

The spelling of 1166254391 in words is "one billion, one hundred sixty-six million, two hundred fifty-four thousand, three hundred ninety-one".