404453421 has 6 divisors (see below), whose sum is σ = 584210510. Its totient is φ = 269635608.

The previous prime is 404453407. The next prime is 404453449. The reversal of 404453421 is 124354404.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 306740196 + 97713225 = 17514^2 + 9885^2 .

It is not a de Polignac number, because 404453421 - 2¹⁰ = 404452397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404453221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22469626 + ... + 22469643.

Almost surely, 2^404453421 is an apocalyptic number.

It is an amenable number.

404453421 is a deficient number, since it is larger than the sum of its proper divisors (179757089).

404453421 is a wasteful number, since it uses less digits than its factorization.

404453421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44939275 (or 44939272 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 404453421 is about 20111.0273481988. The cubic root of 404453421 is about 739.5306379570.

The spelling of 404453421 in words is "four hundred four million, four hundred fifty-three thousand, four hundred twenty-one".