126382021 has 2 divisors, whose sum is σ = 126382022. Its totient is φ = 126382020.

The previous prime is 126381991. The next prime is 126382043. The reversal of 126382021 is 120283621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103245921 + 23136100 = 10161^2 + 4810^2 .

It is a cyclic number.

It is not a de Polignac number, because 126382021 - 2⁵ = 126381989 is a prime.

It is equal to p_7184320 and since 126382021 and 7184320 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126386021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63191010 + 63191011.

It is an arithmetic number, because the mean of its divisors is an integer number (63191011).

Almost surely, 2^126382021 is an apocalyptic number.

It is an amenable number.

126382021 is a deficient number, since it is larger than the sum of its proper divisors (1).

126382021 is an equidigital number, since it uses as much as digits as its factorization.

126382021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 126382021 is about 11241.9758494670. The cubic root of 126382021 is about 501.8359450272.

The spelling of 126382021 in words is "one hundred twenty-six million, three hundred eighty-two thousand, twenty-one".