125412543 has 24 divisors (see below), whose sum is σ = 190689408. Its totient is φ = 82349784.

The previous prime is 125412541. The next prime is 125412557. The reversal of 125412543 is 345214521.

It is not a de Polignac number, because 125412543 - 2¹ = 125412541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125412541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12430 + ... + 20132.

It is an arithmetic number, because the mean of its divisors is an integer number (7945392).

Almost surely, 2^125412543 is an apocalyptic number.

125412543 is a deficient number, since it is larger than the sum of its proper divisors (65276865).

125412543 is an frugal number, since it uses more digits than its factorization.

125412543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7785 (or 7773 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 125412543 is about 11198.7741739889. The cubic root of 125412543 is about 500.5494533143.

The spelling of 125412543 in words is "one hundred twenty-five million, four hundred twelve thousand, five hundred forty-three".