125554521 has 8 divisors (see below), whose sum is σ = 167736960. Its totient is φ = 83537552.

The previous prime is 125554511. The next prime is 125554529. The reversal of 125554521 is 125455521.

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

It is a cyclic number.

It is not a de Polignac number, because 125554521 - 2⁷ = 125554393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125554529) 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 7 ways as a sum of consecutive naturals, for example, 39585 + ... + 42638.

It is an arithmetic number, because the mean of its divisors is an integer number (20967120).

Almost surely, 2^125554521 is an apocalyptic number.

It is an amenable number.

125554521 is a deficient number, since it is larger than the sum of its proper divisors (42182439).

125554521 is an equidigital number, since it uses as much as digits as its factorization.

125554521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82735.

The product of its digits is 10000, while the sum is 30.

The square root of 125554521 is about 11205.1113782952. Note that the first 3 decimals coincide. The cubic root of 125554521 is about 500.7382707095.

The spelling of 125554521 in words is "one hundred twenty-five million, five hundred fifty-four thousand, five hundred twenty-one".