135121625 has 8 divisors (see below), whose sum is σ = 168631944. Its totient is φ = 108097200.

The previous prime is 135121603. The next prime is 135121631. The reversal of 135121625 is 526121531.

It can be written as a sum of positive squares in 4 ways, for example, as 73984 + 135047641 = 272^2 + 11621^2 .

It is not a de Polignac number, because 135121625 - 2⁶ = 135121561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135121594 and 135121603.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 540362 + ... + 540611.

It is an arithmetic number, because the mean of its divisors is an integer number (21078993).

Almost surely, 2^135121625 is an apocalyptic number.

It is an amenable number.

135121625 is a deficient number, since it is larger than the sum of its proper divisors (33510319).

135121625 is an equidigital number, since it uses as much as digits as its factorization.

135121625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080988 (or 1080978 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 135121625 is about 11624.1827669733. The cubic root of 135121625 is about 513.1467939281.

The spelling of 135121625 in words is "one hundred thirty-five million, one hundred twenty-one thousand, six hundred twenty-five".