126617887 has 16 divisors (see below), whose sum is σ = 146686464. Its totient is φ = 108016000.

The previous prime is 126617867. The next prime is 126617891. The reversal of 126617887 is 788716621.

It is a cyclic number.

It is not a de Polignac number, because 126617887 - 2⁷ = 126617759 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 (126617867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79812 + ... + 81382.

It is an arithmetic number, because the mean of its divisors is an integer number (9167904).

Almost surely, 2^126617887 is an apocalyptic number.

126617887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

126617887 is a deficient number, since it is larger than the sum of its proper divisors (20068577).

126617887 is a wasteful number, since it uses less digits than its factorization.

126617887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030.

The product of its digits is 225792, while the sum is 46.

The square root of 126617887 is about 11252.4613751837. The cubic root of 126617887 is about 502.1479421426.

The spelling of 126617887 in words is "one hundred twenty-six million, six hundred seventeen thousand, eight hundred eighty-seven".