126818401 has 4 divisors (see below), whose sum is σ = 127596592. Its totient is φ = 126040212.

The previous prime is 126818399. The next prime is 126818411. The reversal of 126818401 is 104818621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104818621 = 2903 ⋅36107.

It is a cyclic number.

It is not a de Polignac number, because 126818401 - 2¹ = 126818399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126818411) 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 3 ways as a sum of consecutive naturals, for example, 388851 + ... + 389176.

It is an arithmetic number, because the mean of its divisors is an integer number (31899148).

Almost surely, 2^126818401 is an apocalyptic number.

It is an amenable number.

126818401 is a deficient number, since it is larger than the sum of its proper divisors (778191).

126818401 is an equidigital number, since it uses as much as digits as its factorization.

126818401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778190.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 126818401 is about 11261.3676345282. The cubic root of 126818401 is about 502.4128720336.

The spelling of 126818401 in words is "one hundred twenty-six million, eight hundred eighteen thousand, four hundred one".