126806591 has 8 divisors (see below), whose sum is σ = 127788864. Its totient is φ = 125828640.

The previous prime is 126806573. The next prime is 126806593. The reversal of 126806591 is 195608621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126806591 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 (126806593) 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, 78605 + ... + 80201.

It is an arithmetic number, because the mean of its divisors is an integer number (15973608).

Almost surely, 2^126806591 is an apocalyptic number.

126806591 is a deficient number, since it is larger than the sum of its proper divisors (982273).

126806591 is a wasteful number, since it uses less digits than its factorization.

126806591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 126806591 is about 11260.8432632730. The cubic root of 126806591 is about 502.3972757685.

The spelling of 126806591 in words is "one hundred twenty-six million, eight hundred six thousand, five hundred ninety-one".