125781459 has 4 divisors (see below), whose sum is σ = 167708616. Its totient is φ = 83854304.

The previous prime is 125781449. The next prime is 125781499. The reversal of 125781459 is 954187521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125781459 - 2⁴ = 125781443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125781459.

It is not an unprimeable number, because it can be changed into a prime (125781449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20963574 + ... + 20963579.

It is an arithmetic number, because the mean of its divisors is an integer number (41927154).

Almost surely, 2^125781459 is an apocalyptic number.

125781459 is a deficient number, since it is larger than the sum of its proper divisors (41927157).

125781459 is an equidigital number, since it uses as much as digits as its factorization.

125781459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41927156.

The product of its digits is 100800, while the sum is 42.

The square root of 125781459 is about 11215.2333457668. The cubic root of 125781459 is about 501.0397815431.

The spelling of 125781459 in words is "one hundred twenty-five million, seven hundred eighty-one thousand, four hundred fifty-nine".