125681434 has 4 divisors (see below), whose sum is σ = 188522154. Its totient is φ = 62840716.

The previous prime is 125681419. The next prime is 125681443. The reversal of 125681434 is 434186521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 114811225 + 10870209 = 10715^2 + 3297^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 125681434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31420357 + ... + 31420360.

Almost surely, 2^125681434 is an apocalyptic number.

125681434 is a deficient number, since it is larger than the sum of its proper divisors (62840720).

125681434 is an equidigital number, since it uses as much as digits as its factorization.

125681434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62840719.

The product of its digits is 23040, while the sum is 34.

The square root of 125681434 is about 11210.7731223141. The cubic root of 125681434 is about 500.9069326185.

The spelling of 125681434 in words is "one hundred twenty-five million, six hundred eighty-one thousand, four hundred thirty-four".