126103421 has 2 divisors, whose sum is σ = 126103422. Its totient is φ = 126103420.

The previous prime is 126103403. The next prime is 126103423. The reversal of 126103421 is 124301621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116337796 + 9765625 = 10786^2 + 3125^2 .

It is a cyclic number.

It is not a de Polignac number, because 126103421 - 2¹⁴ = 126087037 is a prime.

Together with 126103423, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 126103393 and 126103402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126103423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63051710 + 63051711.

It is an arithmetic number, because the mean of its divisors is an integer number (63051711).

Almost surely, 2^126103421 is an apocalyptic number.

It is an amenable number.

126103421 is a deficient number, since it is larger than the sum of its proper divisors (1).

126103421 is an equidigital number, since it uses as much as digits as its factorization.

126103421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 126103421 is about 11229.5779528885. The cubic root of 126103421 is about 501.4669200821.

The spelling of 126103421 in words is "one hundred twenty-six million, one hundred three thousand, four hundred twenty-one".