125554566 has 8 divisors (see below), whose sum is σ = 251109144. Its totient is φ = 41851520.

The previous prime is 125554553. The next prime is 125554567. The reversal of 125554566 is 665455521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

125554566 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125554567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10462875 + ... + 10462886.

It is an arithmetic number, because the mean of its divisors is an integer number (31388643).

Almost surely, 2^125554566 is an apocalyptic number.

125554566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

125554566 is a wasteful number, since it uses less digits than its factorization.

125554566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20925766.

The product of its digits is 180000, while the sum is 39.

The square root of 125554566 is about 11205.1133863072. The cubic root of 125554566 is about 500.7383305327.

The spelling of 125554566 in words is "one hundred twenty-five million, five hundred fifty-four thousand, five hundred sixty-six".