125644342 has 4 divisors (see below), whose sum is σ = 188466516. Its totient is φ = 62822170.

The previous prime is 125644319. The next prime is 125644411. The reversal of 125644342 is 243446521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 243446521 = 43 ⋅5661547.

It is a super-2 number, since 2×125644342² = 31573001353225928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 31411084 + ... + 31411087.

It is an arithmetic number, because the mean of its divisors is an integer number (47116629).

Almost surely, 2^125644342 is an apocalyptic number.

125644342 is a deficient number, since it is larger than the sum of its proper divisors (62822174).

125644342 is an equidigital number, since it uses as much as digits as its factorization.

125644342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62822173.

The product of its digits is 23040, while the sum is 31.

The square root of 125644342 is about 11209.1186986310. The cubic root of 125644342 is about 500.8576506961.

The spelling of 125644342 in words is "one hundred twenty-five million, six hundred forty-four thousand, three hundred forty-two".