125241505 has 4 divisors (see below), whose sum is σ = 150289812. Its totient is φ = 100193200.

The previous prime is 125241469. The next prime is 125241527. The reversal of 125241505 is 505142521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21446161 + 103795344 = 4631^2 + 10188^2 .

It is a de Polignac number, because none of the positive numbers 2^k-125241505 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125241505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12524146 + ... + 12524155.

It is an arithmetic number, because the mean of its divisors is an integer number (37572453).

Almost surely, 2^125241505 is an apocalyptic number.

It is an amenable number.

125241505 is a deficient number, since it is larger than the sum of its proper divisors (25048307).

125241505 is an equidigital number, since it uses as much as digits as its factorization.

125241505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25048306.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 125241505 is about 11191.1351077538. The cubic root of 125241505 is about 500.3217995124.

The spelling of 125241505 in words is "one hundred twenty-five million, two hundred forty-one thousand, five hundred five".