126900001 has 2 divisors, whose sum is σ = 126900002. Its totient is φ = 126900000.

The previous prime is 126899999. The next prime is 126900023. The reversal of 126900001 is 100009621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126540001 + 360000 = 11249^2 + 600^2 .

It is an emirp because it is prime and its reverse (100009621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126900001 - 2¹ = 126899999 is a prime.

It is a super-2 number, since 2×126900001² = 32207220507600002, which contains 22 as substring.

Together with 126899999, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126900041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63450000 + 63450001.

It is an arithmetic number, because the mean of its divisors is an integer number (63450001).

Almost surely, 2^126900001 is an apocalyptic number.

It is an amenable number.

126900001 is a deficient number, since it is larger than the sum of its proper divisors (1).

126900001 is an equidigital number, since it uses as much as digits as its factorization.

126900001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 126900001 is about 11264.9900576965. The cubic root of 126900001 is about 502.5206064007.

Adding to 126900001 its reverse (100009621), we get a palindrome (226909622).

The spelling of 126900001 in words is "one hundred twenty-six million, nine hundred thousand, one".