125263891 has 2 divisors, whose sum is σ = 125263892. Its totient is φ = 125263890.

The previous prime is 125263867. The next prime is 125263921. The reversal of 125263891 is 198362521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125263891 - 2¹⁵ = 125231123 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125263891.

It is not a weakly prime, because it can be changed into another prime (125263811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62631945 + 62631946.

It is an arithmetic number, because the mean of its divisors is an integer number (62631946).

Almost surely, 2^125263891 is an apocalyptic number.

125263891 is a deficient number, since it is larger than the sum of its proper divisors (1).

125263891 is an equidigital number, since it uses as much as digits as its factorization.

125263891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 125263891 is about 11192.1352297048. The cubic root of 125263891 is about 500.3516073532.

The spelling of 125263891 in words is "one hundred twenty-five million, two hundred sixty-three thousand, eight hundred ninety-one".