125161566 has 16 divisors (see below), whose sum is σ = 253753104. Its totient is φ = 41148864.

The previous prime is 125161559. The next prime is 125161571. The reversal of 125161566 is 665161521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142441 + ... + 143316.

It is an arithmetic number, because the mean of its divisors is an integer number (15859569).

Almost surely, 2^125161566 is an apocalyptic number.

125161566 is an abundant number, since it is smaller than the sum of its proper divisors (128591538).

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

125161566 is a wasteful number, since it uses less digits than its factorization.

125161566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285835.

The product of its digits is 10800, while the sum is 33.

The square root of 125161566 is about 11187.5630054092. The cubic root of 125161566 is about 500.2153285872.

The spelling of 125161566 in words is "one hundred twenty-five million, one hundred sixty-one thousand, five hundred sixty-six".