125519013 has 6 divisors (see below), whose sum is σ = 181305254. Its totient is φ = 83679336.

The previous prime is 125519011. The next prime is 125519077. The reversal of 125519013 is 310915521.

125519013 is a `hidden beast` number, since 12 + 551 + 90 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 102880449 + 22638564 = 10143^2 + 4758^2 .

It is not a de Polignac number, because 125519013 - 2¹ = 125519011 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125519011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6973270 + ... + 6973287.

Almost surely, 2^125519013 is an apocalyptic number.

It is an amenable number.

125519013 is a deficient number, since it is larger than the sum of its proper divisors (55786241).

125519013 is a wasteful number, since it uses less digits than its factorization.

125519013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13946563 (or 13946560 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 125519013 is about 11203.5268107860. The cubic root of 125519013 is about 500.6910617606.

The spelling of 125519013 in words is "one hundred twenty-five million, five hundred nineteen thousand, thirteen".