125905549 has 12 divisors (see below), whose sum is σ = 159776928. Its totient is φ = 98107800.

The previous prime is 125905543. The next prime is 125905567. The reversal of 125905549 is 945509521.

It is not a de Polignac number, because 125905549 - 2⁵ = 125905517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125905543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116257 + ... + 117334.

It is an arithmetic number, because the mean of its divisors is an integer number (13314744).

Almost surely, 2^125905549 is an apocalyptic number.

It is an amenable number.

125905549 is a deficient number, since it is larger than the sum of its proper divisors (33871379).

125905549 is a wasteful number, since it uses less digits than its factorization.

125905549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233616 (or 233609 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 125905549 is about 11220.7641896620. The cubic root of 125905549 is about 501.2044947216.

The spelling of 125905549 in words is "one hundred twenty-five million, nine hundred five thousand, five hundred forty-nine".