125998811 has 2 divisors, whose sum is σ = 125998812. Its totient is φ = 125998810.

The previous prime is 125998799. The next prime is 125998843. The reversal of 125998811 is 118899521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125998811 is a prime.

It is not a weakly prime, because it can be changed into another prime (125998891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62999405 + 62999406.

It is an arithmetic number, because the mean of its divisors is an integer number (62999406).

Almost surely, 2^125998811 is an apocalyptic number.

125998811 is a deficient number, since it is larger than the sum of its proper divisors (1).

125998811 is an equidigital number, since it uses as much as digits as its factorization.

125998811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 44.

The square root of 125998811 is about 11224.9191979274. The cubic root of 125998811 is about 501.3282165573.

The spelling of 125998811 in words is "one hundred twenty-five million, nine hundred ninety-eight thousand, eight hundred eleven".