125520345 has 12 divisors (see below), whose sum is σ = 217568676. Its totient is φ = 66944160.

The previous prime is 125520337. The next prime is 125520379. The reversal of 125520345 is 543025521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 99141849 + 26378496 = 9957^2 + 5136^2 .

It is not a de Polignac number, because 125520345 - 2³ = 125520337 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 1394626 + ... + 1394715.

It is an arithmetic number, because the mean of its divisors is an integer number (18130723).

Almost surely, 2^125520345 is an apocalyptic number.

125520345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125520345 is a deficient number, since it is larger than the sum of its proper divisors (92048331).

125520345 is a wasteful number, since it uses less digits than its factorization.

125520345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789352 (or 2789349 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 125520345 is about 11203.5862561949. The cubic root of 125520345 is about 500.6928328552.

Adding to 125520345 its reverse (543025521), we get a palindrome (668545866).

The spelling of 125520345 in words is "one hundred twenty-five million, five hundred twenty thousand, three hundred forty-five".