125642158 has 8 divisors (see below), whose sum is σ = 193556952. Its totient is φ = 61123176.

The previous prime is 125642149. The next prime is 125642159. The reversal of 125642158 is 851246521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125642159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848860 + ... + 849007.

It is an arithmetic number, because the mean of its divisors is an integer number (24194619).

Almost surely, 2^125642158 is an apocalyptic number.

125642158 is a deficient number, since it is larger than the sum of its proper divisors (67914794).

125642158 is a wasteful number, since it uses less digits than its factorization.

125642158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697906.

The product of its digits is 19200, while the sum is 34.

The square root of 125642158 is about 11209.0212775246. The cubic root of 125642158 is about 500.8547486435.

Adding to 125642158 its reverse (851246521), we get a palindrome (976888679).

The spelling of 125642158 in words is "one hundred twenty-five million, six hundred forty-two thousand, one hundred fifty-eight".