126541999 has 8 divisors (see below), whose sum is σ = 136183248. Its totient is φ = 117144960.

The previous prime is 126541979. The next prime is 126542027. The reversal of 126541999 is 999145621.

It is a happy number.

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

It is not a de Polignac number, because 126541999 - 2⁹ = 126541487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126541979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59977 + ... + 62050.

It is an arithmetic number, because the mean of its divisors is an integer number (17022906).

Almost surely, 2^126541999 is an apocalyptic number.

126541999 is a deficient number, since it is larger than the sum of its proper divisors (9641249).

126541999 is a wasteful number, since it uses less digits than its factorization.

126541999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122105.

The product of its digits is 174960, while the sum is 46.

The square root of 126541999 is about 11249.0888075435. The cubic root of 126541999 is about 502.0476018732.

It can be divided in two parts, 1265 and 41999, that added together give a square (43264 = 208²).

The spelling of 126541999 in words is "one hundred twenty-six million, five hundred forty-one thousand, nine hundred ninety-nine".