125621550 has 48 divisors (see below), whose sum is σ = 346160880. Its totient is φ = 33498720.

The previous prime is 125621543. The next prime is 125621563. The reversal of 125621550 is 55126521.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45177 + ... + 47876.

It is an arithmetic number, because the mean of its divisors is an integer number (7211685).

Almost surely, 2^125621550 is an apocalyptic number.

125621550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125621550 is an abundant number, since it is smaller than the sum of its proper divisors (220539330).

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

125621550 is a wasteful number, since it uses less digits than its factorization.

125621550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93074 (or 93063 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 125621550 is about 11208.1019802641. The cubic root of 125621550 is about 500.8273635174.

The spelling of 125621550 in words is "one hundred twenty-five million, six hundred twenty-one thousand, five hundred fifty".