135921925 has 24 divisors (see below), whose sum is σ = 173533536. Its totient is φ = 105551040.

The previous prime is 135921913. The next prime is 135921931. The reversal of 135921925 is 529129531.

It is not a de Polignac number, because 135921925 - 2⁵ = 135921893 is a prime.

It is a super-3 number, since 3×135921925³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243747 + ... + 244303.

It is an arithmetic number, because the mean of its divisors is an integer number (7230564).

Almost surely, 2^135921925 is an apocalyptic number.

It is an amenable number.

135921925 is a deficient number, since it is larger than the sum of its proper divisors (37611611).

135921925 is a wasteful number, since it uses less digits than its factorization.

135921925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 832 counting only the distinct ones).

The product of its digits is 24300, while the sum is 37.

The square root of 135921925 is about 11658.5558711189. Note that the first 3 decimals coincide. The cubic root of 135921925 is about 514.1578910539.

The spelling of 135921925 in words is "one hundred thirty-five million, nine hundred twenty-one thousand, nine hundred twenty-five".