125020645 has 4 divisors (see below), whose sum is σ = 150024780. Its totient is φ = 100016512.

The previous prime is 125020633. The next prime is 125020667. The reversal of 125020645 is 546020521.

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 31337604 + 93683041 = 5598^2 + 9679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125020645 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12502060 + ... + 12502069.

It is an arithmetic number, because the mean of its divisors is an integer number (37506195).

Almost surely, 2^125020645 is an apocalyptic number.

It is an amenable number.

125020645 is a deficient number, since it is larger than the sum of its proper divisors (25004135).

125020645 is an equidigital number, since it uses as much as digits as its factorization.

125020645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25004134.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 125020645 is about 11181.2631218481. The cubic root of 125020645 is about 500.0275251514.

The spelling of 125020645 in words is "one hundred twenty-five million, twenty thousand, six hundred forty-five".