125606646 has 64 divisors (see below), whose sum is σ = 307607040. Its totient is φ = 37674720.

The previous prime is 125606641. The next prime is 125606651. The reversal of 125606646 is 646606521.

It is a happy number.

125606646 is a `hidden beast` number, since 1 + 2 + 5 + 6 + 0 + 6 + 646 = 666.

It is an interprime number because it is at equal distance from previous prime (125606641) and next prime (125606651).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 125606646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125606641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60156 + ... + 62208.

It is an arithmetic number, because the mean of its divisors is an integer number (4806360).

Almost surely, 2^125606646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125606646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153803520).

125606646 is an abundant number, since it is smaller than the sum of its proper divisors (182000394).

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

125606646 is a wasteful number, since it uses less digits than its factorization.

125606646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178 (or 2172 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 125606646 is about 11207.4370843650. The cubic root of 125606646 is about 500.8075563367.

The spelling of 125606646 in words is "one hundred twenty-five million, six hundred six thousand, six hundred forty-six".