126473821 has 2 divisors, whose sum is σ = 126473822. Its totient is φ = 126473820.

The previous prime is 126473813. The next prime is 126473833. The reversal of 126473821 is 128374621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119661721 + 6812100 = 10939^2 + 2610^2 .

It is a cyclic number.

It is not a de Polignac number, because 126473821 - 2³ = 126473813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126473891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63236910 + 63236911.

It is an arithmetic number, because the mean of its divisors is an integer number (63236911).

Almost surely, 2^126473821 is an apocalyptic number.

It is an amenable number.

126473821 is a deficient number, since it is larger than the sum of its proper divisors (1).

126473821 is an equidigital number, since it uses as much as digits as its factorization.

126473821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 126473821 is about 11246.0580204799. The cubic root of 126473821 is about 501.9574216677.

The spelling of 126473821 in words is "one hundred twenty-six million, four hundred seventy-three thousand, eight hundred twenty-one".