125405345 has 16 divisors (see below), whose sum is σ = 171596880. Its totient is φ = 87158784.

The previous prime is 125405341. The next prime is 125405359. The reversal of 125405345 is 543504521.

It can be written as a sum of positive squares in 8 ways, for example, as 18241441 + 107163904 = 4271^2 + 10352^2 .

It is a cyclic number.

It is not a de Polignac number, because 125405345 - 2² = 125405341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125405341) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 55640 + ... + 57849.

It is an arithmetic number, because the mean of its divisors is an integer number (10724805).

Almost surely, 2^125405345 is an apocalyptic number.

It is an amenable number.

125405345 is a deficient number, since it is larger than the sum of its proper divisors (46191535).

125405345 is a wasteful number, since it uses less digits than its factorization.

125405345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113524.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 125405345 is about 11198.4527949177. The cubic root of 125405345 is about 500.5398768562.

Adding to 125405345 its reverse (543504521), we get a palindrome (668909866).

The spelling of 125405345 in words is "one hundred twenty-five million, four hundred five thousand, three hundred forty-five".