125565442 has 4 divisors (see below), whose sum is σ = 188348166. Its totient is φ = 62782720.

The previous prime is 125565439. The next prime is 125565449. The reversal of 125565442 is 244565521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 125462401 + 103041 = 11201^2 + 321^2 .

It is a junction number, because it is equal to n+sod(n) for n = 125565398 and 125565407.

It is not an unprimeable number, because it can be changed into a prime (125565449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31391359 + ... + 31391362.

Almost surely, 2^125565442 is an apocalyptic number.

125565442 is a deficient number, since it is larger than the sum of its proper divisors (62782724).

125565442 is an equidigital number, since it uses as much as digits as its factorization.

125565442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62782723.

The product of its digits is 48000, while the sum is 34.

The square root of 125565442 is about 11205.5986899407. The cubic root of 125565442 is about 500.7527887162.

The spelling of 125565442 in words is "one hundred twenty-five million, five hundred sixty-five thousand, four hundred forty-two".