126400033 has 2 divisors, whose sum is σ = 126400034. Its totient is φ = 126400032.

The previous prime is 126400031. The next prime is 126400039. The reversal of 126400033 is 330004621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107806689 + 18593344 = 10383^2 + 4312^2 .

It is a cyclic number.

It is not a de Polignac number, because 126400033 - 2¹ = 126400031 is a prime.

Together with 126400031, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (126400031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63200016 + 63200017.

It is an arithmetic number, because the mean of its divisors is an integer number (63200017).

Almost surely, 2^126400033 is an apocalyptic number.

It is an amenable number.

126400033 is a deficient number, since it is larger than the sum of its proper divisors (1).

126400033 is an equidigital number, since it uses as much as digits as its factorization.

126400033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 126400033 is about 11242.7769256532. The cubic root of 126400033 is about 501.8597844931.

Adding to 126400033 its reverse (330004621), we get a palindrome (456404654).

The spelling of 126400033 in words is "one hundred twenty-six million, four hundred thousand, thirty-three".