125581523 has 2 divisors, whose sum is σ = 125581524. Its totient is φ = 125581522.

The previous prime is 125581501. The next prime is 125581531. The reversal of 125581523 is 325185521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125581523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125581523.

It is not a weakly prime, because it can be changed into another prime (125584523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62790761 + 62790762.

It is an arithmetic number, because the mean of its divisors is an integer number (62790762).

Almost surely, 2^125581523 is an apocalyptic number.

125581523 is a deficient number, since it is larger than the sum of its proper divisors (1).

125581523 is an equidigital number, since it uses as much as digits as its factorization.

125581523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12000, while the sum is 32.

The square root of 125581523 is about 11206.3162100665. The cubic root of 125581523 is about 500.7741647193.

The spelling of 125581523 in words is "one hundred twenty-five million, five hundred eighty-one thousand, five hundred twenty-three".