125987866 has 8 divisors (see below), whose sum is σ = 191105460. Its totient is φ = 62286048.

The previous prime is 125987863. The next prime is 125987887. The reversal of 125987866 is 668789521.

It can be written as a sum of positive squares in 2 ways, for example, as 106812225 + 19175641 = 10335^2 + 4379^2 .

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

It is not an unprimeable number, because it can be changed into a prime (125987863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353721 + ... + 354076.

Almost surely, 2^125987866 is an apocalyptic number.

125987866 is a deficient number, since it is larger than the sum of its proper divisors (65117594).

125987866 is an equidigital number, since it uses as much as digits as its factorization.

125987866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707888.

The product of its digits is 1451520, while the sum is 52.

The square root of 125987866 is about 11224.4316559904. The cubic root of 125987866 is about 501.3137000282.

The spelling of 125987866 in words is "one hundred twenty-five million, nine hundred eighty-seven thousand, eight hundred sixty-six".