125121543 has 16 divisors (see below), whose sum is σ = 170311680. Its totient is φ = 81690336.

The previous prime is 125121533. The next prime is 125121551. The reversal of 125121543 is 345121521.

It is a happy number.

It is not a de Polignac number, because 125121543 - 2⁵ = 125121511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125121533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28021 + ... + 32177.

It is an arithmetic number, because the mean of its divisors is an integer number (10644480).

Almost surely, 2^125121543 is an apocalyptic number.

125121543 is a deficient number, since it is larger than the sum of its proper divisors (45190137).

125121543 is a wasteful number, since it uses less digits than its factorization.

125121543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366.

The product of its digits is 1200, while the sum is 24.

The square root of 125121543 is about 11185.7741350342. The cubic root of 125121543 is about 500.1620048365.

The spelling of 125121543 in words is "one hundred twenty-five million, one hundred twenty-one thousand, five hundred forty-three".