125806540 has 12 divisors (see below), whose sum is σ = 264193776. Its totient is φ = 50322608.

The previous prime is 125806529. The next prime is 125806547. The reversal of 125806540 is 45608521.

It is not an unprimeable number, because it can be changed into a prime (125806547) 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 3 ways as a sum of consecutive naturals, for example, 3145144 + ... + 3145183.

It is an arithmetic number, because the mean of its divisors is an integer number (22016148).

Almost surely, 2^125806540 is an apocalyptic number.

125806540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125806540 is an abundant number, since it is smaller than the sum of its proper divisors (138387236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125806540 is a wasteful number, since it uses less digits than its factorization.

125806540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6290336 (or 6290334 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 125806540 is about 11216.3514566904. The cubic root of 125806540 is about 501.0730820091.

The spelling of 125806540 in words is "one hundred twenty-five million, eight hundred six thousand, five hundred forty".