125771523 has 4 divisors (see below), whose sum is σ = 167695368. Its totient is φ = 83847680.

The previous prime is 125771489. The next prime is 125771531. The reversal of 125771523 is 325177521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325177521 = 3 ⋅108392507.

It is a cyclic number.

It is not a de Polignac number, because 125771523 - 2⁹ = 125771011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125771533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20961918 + ... + 20961923.

It is an arithmetic number, because the mean of its divisors is an integer number (41923842).

Almost surely, 2^125771523 is an apocalyptic number.

125771523 is a deficient number, since it is larger than the sum of its proper divisors (41923845).

125771523 is an equidigital number, since it uses as much as digits as its factorization.

125771523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41923844.

The product of its digits is 14700, while the sum is 33.

The square root of 125771523 is about 11214.7903680809. The cubic root of 125771523 is about 501.0265881244.

The spelling of 125771523 in words is "one hundred twenty-five million, seven hundred seventy-one thousand, five hundred twenty-three".