125221040 has 80 divisors (see below), whose sum is σ = 334264320. Its totient is φ = 42735360.

The previous prime is 125221037. The next prime is 125221051. The reversal of 125221040 is 40122521.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173801 + ... + 174519.

It is an arithmetic number, because the mean of its divisors is an integer number (4178304).

Almost surely, 2^125221040 is an apocalyptic number.

125221040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125221040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167132160).

125221040 is an abundant number, since it is smaller than the sum of its proper divisors (209043280).

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

125221040 is a wasteful number, since it uses less digits than its factorization.

125221040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 125221040 is about 11190.2207306201. The cubic root of 125221040 is about 500.2945464507.

Adding to 125221040 its reverse (40122521), we get a palindrome (165343561).

The spelling of 125221040 in words is "one hundred twenty-five million, two hundred twenty-one thousand, forty".