125215442 has 16 divisors (see below), whose sum is σ = 205568064. Its totient is φ = 56730000.

The previous prime is 125215439. The next prime is 125215451. The reversal of 125215442 is 244512521.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2309 + ... + 15992.

It is an arithmetic number, because the mean of its divisors is an integer number (12848004).

Almost surely, 2^125215442 is an apocalyptic number.

125215442 is a deficient number, since it is larger than the sum of its proper divisors (80352622).

125215442 is a wasteful number, since it uses less digits than its factorization.

125215442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18625.

The product of its digits is 3200, while the sum is 26.

The square root of 125215442 is about 11189.9705987103. The cubic root of 125215442 is about 500.2870911258.

Adding to 125215442 its reverse (244512521), we get a palindrome (369727963).

The spelling of 125215442 in words is "one hundred twenty-five million, two hundred fifteen thousand, four hundred forty-two".