125315543 has 2 divisors, whose sum is σ = 125315544. Its totient is φ = 125315542.

The previous prime is 125315539. The next prime is 125315579. The reversal of 125315543 is 345513521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125315543 - 2² = 125315539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125315503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62657771 + 62657772.

It is an arithmetic number, because the mean of its divisors is an integer number (62657772).

Almost surely, 2^125315543 is an apocalyptic number.

125315543 is a deficient number, since it is larger than the sum of its proper divisors (1).

125315543 is an equidigital number, since it uses as much as digits as its factorization.

125315543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 29.

The square root of 125315543 is about 11194.4425051005. The cubic root of 125315543 is about 500.4203704783.

The spelling of 125315543 in words is "one hundred twenty-five million, three hundred fifteen thousand, five hundred forty-three".