125821850 has 72 divisors (see below), whose sum is σ = 294085344. Its totient is φ = 39204000.

The previous prime is 125821847. The next prime is 125821859. The reversal of 125821850 is 58128521.

It is a happy number.

It is a super-2 number, since 2×125821850² = 31662275874845000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125821859) 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 35 ways as a sum of consecutive naturals, for example, 40865 + ... + 43835.

Almost surely, 2^125821850 is an apocalyptic number.

125821850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125821850 is an abundant number, since it is smaller than the sum of its proper divisors (168263494).

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

125821850 is a wasteful number, since it uses less digits than its factorization.

125821850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012 (or 2996 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 125821850 is about 11217.0339216747. The cubic root of 125821850 is about 501.0934071785.

The spelling of 125821850 in words is "one hundred twenty-five million, eight hundred twenty-one thousand, eight hundred fifty".