125542220 has 12 divisors (see below), whose sum is σ = 263638704. Its totient is φ = 50216880.

The previous prime is 125542201. The next prime is 125542223. The reversal of 125542220 is 22245521.

It is not an unprimeable number, because it can be changed into a prime (125542223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3138536 + ... + 3138575.

It is an arithmetic number, because the mean of its divisors is an integer number (21969892).

Almost surely, 2^125542220 is an apocalyptic number.

125542220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125542220 is an abundant number, since it is smaller than the sum of its proper divisors (138096484).

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

125542220 is a wasteful number, since it uses less digits than its factorization.

125542220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6277120 (or 6277118 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 125542220 is about 11204.5624635681. The cubic root of 125542220 is about 500.7219171696.

Adding to 125542220 its reverse (22245521), we get a palindrome (147787741).

The spelling of 125542220 in words is "one hundred twenty-five million, five hundred forty-two thousand, two hundred twenty".