126424321 has 2 divisors, whose sum is σ = 126424322. Its totient is φ = 126424320.

The previous prime is 126424303. The next prime is 126424327. The reversal of 126424321 is 123424621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108910096 + 17514225 = 10436^2 + 4185^2 .

It is an emirp because it is prime and its reverse (123424621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126424321 - 2¹¹ = 126422273 is a prime.

It is a super-2 number, since 2×126424321² = 31966217880622082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126424327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63212160 + 63212161.

It is an arithmetic number, because the mean of its divisors is an integer number (63212161).

Almost surely, 2^126424321 is an apocalyptic number.

It is an amenable number.

126424321 is a deficient number, since it is larger than the sum of its proper divisors (1).

126424321 is an equidigital number, since it uses as much as digits as its factorization.

126424321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

The square root of 126424321 is about 11243.8570339541. The cubic root of 126424321 is about 501.8919268629.

Adding to 126424321 its reverse (123424621), we get a palindrome (249848942).

The spelling of 126424321 in words is "one hundred twenty-six million, four hundred twenty-four thousand, three hundred twenty-one".