125173553 has 8 divisors (see below), whose sum is σ = 129885672. Its totient is φ = 120531456.

The previous prime is 125173537. The next prime is 125173583. The reversal of 125173553 is 355371521.

It can be written as a sum of positive squares in 4 ways, for example, as 56731024 + 68442529 = 7532^2 + 8273^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125173553 - 2⁴ = 125173537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125173523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13850 + ... + 21027.

It is an arithmetic number, because the mean of its divisors is an integer number (16235709).

Almost surely, 2^125173553 is an apocalyptic number.

It is an amenable number.

125173553 is a deficient number, since it is larger than the sum of its proper divisors (4712119).

125173553 is an equidigital number, since it uses as much as digits as its factorization.

125173553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35011.

The product of its digits is 15750, while the sum is 32.

The square root of 125173553 is about 11188.0987214093. The cubic root of 125173553 is about 500.2312969869.

The spelling of 125173553 in words is "one hundred twenty-five million, one hundred seventy-three thousand, five hundred fifty-three".