125681550 has 48 divisors (see below), whose sum is σ = 317591280. Its totient is φ = 32880640.

The previous prime is 125681537. The next prime is 125681557. The reversal of 125681550 is 55186521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125681557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46 + ... + 15854.

It is an arithmetic number, because the mean of its divisors is an integer number (6616485).

Almost surely, 2^125681550 is an apocalyptic number.

125681550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 125681550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158795640).

125681550 is an abundant number, since it is smaller than the sum of its proper divisors (191909730).

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

125681550 is a wasteful number, since it uses less digits than its factorization.

125681550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15877 (or 15872 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 125681550 is about 11210.7782959079. The cubic root of 125681550 is about 500.9070867255.

The spelling of 125681550 in words is "one hundred twenty-five million, six hundred eighty-one thousand, five hundred fifty".