155505125 has 8 divisors (see below), whose sum is σ = 194070552. Its totient is φ = 124404000.

The previous prime is 155505113. The next prime is 155505131. The reversal of 155505125 is 521505551.

It can be written as a sum of positive squares in 4 ways, for example, as 12630916 + 142874209 = 3554^2 + 11953^2 .

It is not a de Polignac number, because 155505125 - 2⁴ = 155505109 is a prime.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621896 + ... + 622145.

It is an arithmetic number, because the mean of its divisors is an integer number (24258819).

Almost surely, 2^155505125 is an apocalyptic number.

It is an amenable number.

155505125 is a deficient number, since it is larger than the sum of its proper divisors (38565427).

155505125 is an equidigital number, since it uses as much as digits as its factorization.

155505125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244056 (or 1244046 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 29.

The square root of 155505125 is about 12470.1694054251. The cubic root of 155505125 is about 537.7514237481.

The spelling of 155505125 in words is "one hundred fifty-five million, five hundred five thousand, one hundred twenty-five".