125553825 has 18 divisors (see below), whose sum is σ = 224881254. Its totient is φ = 66961920.

The previous prime is 125553821. The next prime is 125553853. The reversal of 125553825 is 528355521.

125553825 is a `hidden beast` number, since 1 + 25 + 553 + 82 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 471969 + 125081856 = 687^2 + 11184^2 .

It is not a de Polignac number, because 125553825 - 2² = 125553821 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 125553825.

It is not an unprimeable number, because it can be changed into a prime (125553821) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 278784 + ... + 279233.

It is an arithmetic number, because the mean of its divisors is an integer number (12493403).

Almost surely, 2^125553825 is an apocalyptic number.

125553825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125553825 is a deficient number, since it is larger than the sum of its proper divisors (99327429).

125553825 is a wasteful number, since it uses less digits than its factorization.

125553825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558033 (or 558025 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 125553825 is about 11205.0803209973. The cubic root of 125553825 is about 500.7373454422.

The spelling of 125553825 in words is "one hundred twenty-five million, five hundred fifty-three thousand, eight hundred twenty-five".