125721224 has 16 divisors (see below), whose sum is σ = 237528720. Its totient is φ = 62380240.

The previous prime is 125721221. The next prime is 125721359. The reversal of 125721224 is 422127521.

It is a junction number, because it is equal to n+sod(n) for n = 125721193 and 125721202.

It is not an unprimeable number, because it can be changed into a prime (125721221) 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, 58934 + ... + 61029.

It is an arithmetic number, because the mean of its divisors is an integer number (14845545).

Almost surely, 2^125721224 is an apocalyptic number.

It is an amenable number.

125721224 is a deficient number, since it is larger than the sum of its proper divisors (111807496).

125721224 is a wasteful number, since it uses less digits than its factorization.

125721224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120100 (or 120096 counting only the distinct ones).

The product of its digits is 2240, while the sum is 26.

The square root of 125721224 is about 11212.5476141687. The cubic root of 125721224 is about 500.9597884335.

Adding to 125721224 its reverse (422127521), we get a palindrome (547848745).

The spelling of 125721224 in words is "one hundred twenty-five million, seven hundred twenty-one thousand, two hundred twenty-four".