126923865 has 16 divisors (see below), whose sum is σ = 210081600. Its totient is φ = 65358272.

The previous prime is 126923861. The next prime is 126923869. The reversal of 126923865 is 568329621.

It is an interprime number because it is at equal distance from previous prime (126923861) and next prime (126923869).

It is a cyclic number.

It is not a de Polignac number, because 126923865 - 2² = 126923861 is a prime.

It is a super-2 number, since 2×126923865² = 32219335013076450, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (126923861) 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, 145455 + ... + 146324.

It is an arithmetic number, because the mean of its divisors is an integer number (13130100).

Almost surely, 2^126923865 is an apocalyptic number.

126923865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126923865 is a deficient number, since it is larger than the sum of its proper divisors (83157735).

126923865 is a wasteful number, since it uses less digits than its factorization.

126923865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291816.

The product of its digits is 155520, while the sum is 42.

The square root of 126923865 is about 11266.0492187812. The cubic root of 126923865 is about 502.5521046933.

The spelling of 126923865 in words is "one hundred twenty-six million, nine hundred twenty-three thousand, eight hundred sixty-five".