449152421 has 2 divisors, whose sum is σ = 449152422. Its totient is φ = 449152420.

The previous prime is 449152399. The next prime is 449152447. The reversal of 449152421 is 124251944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 433264225 + 15888196 = 20815^2 + 3986^2 .

It is a cyclic number.

It is not a de Polignac number, because 449152421 - 2⁶ = 449152357 is a prime.

It is a super-2 number, since 2×449152421² = 403475794580322482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449152321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224576210 + 224576211.

It is an arithmetic number, because the mean of its divisors is an integer number (224576211).

Almost surely, 2^449152421 is an apocalyptic number.

It is an amenable number.

449152421 is a deficient number, since it is larger than the sum of its proper divisors (1).

449152421 is an equidigital number, since it uses as much as digits as its factorization.

449152421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 449152421 is about 21193.2163911002. The cubic root of 449152421 is about 765.8280131386.

The spelling of 449152421 in words is "four hundred forty-nine million, one hundred fifty-two thousand, four hundred twenty-one".