125556406 has 8 divisors (see below), whose sum is σ = 188576280. Its totient is φ = 62697648.

The previous prime is 125556401. The next prime is 125556437. The reversal of 125556406 is 604655521.

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

It is a super-2 number, since 2×125556406² = 31528822175273672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125556401) 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, 38311 + ... + 41458.

It is an arithmetic number, because the mean of its divisors is an integer number (23572035).

Almost surely, 2^125556406 is an apocalyptic number.

125556406 is a deficient number, since it is larger than the sum of its proper divisors (63019874).

125556406 is an equidigital number, since it uses as much as digits as its factorization.

125556406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80558.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 125556406 is about 11205.1954913781. The cubic root of 125556406 is about 500.7407766246.

The spelling of 125556406 in words is "one hundred twenty-five million, five hundred fifty-six thousand, four hundred six".