125198638 has 8 divisors (see below), whose sum is σ = 197682120. Its totient is φ = 59304600.

The previous prime is 125198629. The next prime is 125198653. The reversal of 125198638 is 836891521.

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

It is a junction number, because it is equal to n+sod(n) for n = 125198594 and 125198603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1647313 + ... + 1647388.

It is an arithmetic number, because the mean of its divisors is an integer number (24710265).

Almost surely, 2^125198638 is an apocalyptic number.

125198638 is a deficient number, since it is larger than the sum of its proper divisors (72483482).

125198638 is a wasteful number, since it uses less digits than its factorization.

125198638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294722.

The product of its digits is 103680, while the sum is 43.

The square root of 125198638 is about 11189.2197225723. The cubic root of 125198638 is about 500.2647104986.

The spelling of 125198638 in words is "one hundred twenty-five million, one hundred ninety-eight thousand, six hundred thirty-eight".