125643523 has 6 divisors (see below), whose sum is σ = 132604764. Its totient is φ = 119030364.

The previous prime is 125643487. The next prime is 125643547. The reversal of 125643523 is 325346521.

It is a happy number.

It is not a de Polignac number, because 125643523 - 2¹³ = 125635331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125643593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173661 + ... + 174382.

It is an arithmetic number, because the mean of its divisors is an integer number (22100794).

Almost surely, 2^125643523 is an apocalyptic number.

125643523 is a deficient number, since it is larger than the sum of its proper divisors (6961241).

125643523 is an equidigital number, since it uses as much as digits as its factorization.

125643523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348081 (or 348062 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 125643523 is about 11209.0821658154. The cubic root of 125643523 is about 500.8565624303.

The spelling of 125643523 in words is "one hundred twenty-five million, six hundred forty-three thousand, five hundred twenty-three".