126271805 has 16 divisors (see below), whose sum is σ = 165746304. Its totient is φ = 91586880.

The previous prime is 126271763. The next prime is 126271807. The reversal of 126271805 is 508172621.

It is a de Polignac number, because none of the positive numbers 2^k-126271805 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 (126271807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18944 + ... + 24726.

It is an arithmetic number, because the mean of its divisors is an integer number (10359144).

Almost surely, 2^126271805 is an apocalyptic number.

It is an amenable number.

126271805 is a deficient number, since it is larger than the sum of its proper divisors (39474499).

126271805 is a wasteful number, since it uses less digits than its factorization.

126271805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6196.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 126271805 is about 11237.0727949943. The cubic root of 126271805 is about 501.6900212206.

The spelling of 126271805 in words is "one hundred twenty-six million, two hundred seventy-one thousand, eight hundred five".