125295509 has 4 divisors (see below), whose sum is σ = 125378880. Its totient is φ = 125212140.

The previous prime is 125295497. The next prime is 125295523. The reversal of 125295509 is 905592521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 905592521 = 73 ⋅12405377.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125295509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125295539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39389 + ... + 42450.

It is an arithmetic number, because the mean of its divisors is an integer number (31344720).

Almost surely, 2^125295509 is an apocalyptic number.

It is an amenable number.

125295509 is a deficient number, since it is larger than the sum of its proper divisors (83371).

125295509 is an equidigital number, since it uses as much as digits as its factorization.

125295509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83370.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 125295509 is about 11193.5476503207. The cubic root of 125295509 is about 500.3937019162.

The spelling of 125295509 in words is "one hundred twenty-five million, two hundred ninety-five thousand, five hundred nine".