125417816242 has 4 divisors (see below), whose sum is σ = 188126724366. Its totient is φ = 62708908120.

The previous prime is 125417816177. The next prime is 125417816267. The reversal of 125417816242 is 242618714521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242618714521 = 709 ⋅342198469.

It can be written as a sum of positive squares in only one way, i.e., 111041566441 + 14376249801 = 333229^2 + 119901^2 .

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, 31354454059 + ... + 31354454062.

Almost surely, 2^125417816242 is an apocalyptic number.

125417816242 is a deficient number, since it is larger than the sum of its proper divisors (62708908124).

125417816242 is an equidigital number, since it uses as much as digits as its factorization.

125417816242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62708908123.

The product of its digits is 215040, while the sum is 43.

The spelling of 125417816242 in words is "one hundred twenty-five billion, four hundred seventeen million, eight hundred sixteen thousand, two hundred forty-two".