125285405 has 24 divisors (see below), whose sum is σ = 175630680. Its totient is φ = 85545600.

The previous prime is 125285351. The next prime is 125285437. The reversal of 125285405 is 504582521.

It can be written as a sum of positive squares in 4 ways, for example, as 4351396 + 120934009 = 2086^2 + 10997^2 .

It is not a de Polignac number, because 125285405 - 2⁶ = 125285341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64955 + ... + 66855.

It is an arithmetic number, because the mean of its divisors is an integer number (7317945).

Almost surely, 2^125285405 is an apocalyptic number.

It is an amenable number.

125285405 is a deficient number, since it is larger than the sum of its proper divisors (50345275).

125285405 is a wasteful number, since it uses less digits than its factorization.

125285405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2182 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 125285405 is about 11193.0963097795. The cubic root of 125285405 is about 500.3802507454.

The spelling of 125285405 in words is "one hundred twenty-five million, two hundred eighty-five thousand, four hundred five".