126590291 has 2 divisors, whose sum is σ = 126590292. Its totient is φ = 126590290.

The previous prime is 126590281. The next prime is 126590377. The reversal of 126590291 is 192095621.

It is a weak prime.

It is an emirp because it is prime and its reverse (192095621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126590291 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (126590281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63295145 + 63295146.

It is an arithmetic number, because the mean of its divisors is an integer number (63295146).

Almost surely, 2^126590291 is an apocalyptic number.

126590291 is a deficient number, since it is larger than the sum of its proper divisors (1).

126590291 is an equidigital number, since it uses as much as digits as its factorization.

126590291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 126590291 is about 11251.2350877581. The cubic root of 126590291 is about 502.1114589311. Note that the first 3 decimals are identical.

The spelling of 126590291 in words is "one hundred twenty-six million, five hundred ninety thousand, two hundred ninety-one".