126401819 has 2 divisors, whose sum is σ = 126401820. Its totient is φ = 126401818.

The previous prime is 126401791. The next prime is 126401827. The reversal of 126401819 is 918104621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126401819 - 2¹² = 126397723 is a prime.

It is a super-2 number, since 2×126401819² = 31954839693017522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126401839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63200909 + 63200910.

It is an arithmetic number, because the mean of its divisors is an integer number (63200910).

Almost surely, 2^126401819 is an apocalyptic number.

126401819 is a deficient number, since it is larger than the sum of its proper divisors (1).

126401819 is an equidigital number, since it uses as much as digits as its factorization.

126401819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 126401819 is about 11242.8563541477. The cubic root of 126401819 is about 501.8621481986.

The spelling of 126401819 in words is "one hundred twenty-six million, four hundred one thousand, eight hundred nineteen".