421331453 has 16 divisors (see below), whose sum is σ = 440328960. Its totient is φ = 402849600.

The previous prime is 421331387. The next prime is 421331467. The reversal of 421331453 is 354133124.

It is a cyclic number.

It is not a de Polignac number, because 421331453 - 2¹⁸ = 421069309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421331473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 512783 + ... + 513603.

It is an arithmetic number, because the mean of its divisors is an integer number (27520560).

Almost surely, 2^421331453 is an apocalyptic number.

It is an amenable number.

421331453 is a deficient number, since it is larger than the sum of its proper divisors (18997507).

421331453 is a wasteful number, since it uses less digits than its factorization.

421331453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108.

The product of its digits is 4320, while the sum is 26.

The square root of 421331453 is about 20526.3599549457. The cubic root of 421331453 is about 749.6777596421.

Adding to 421331453 its reverse (354133124), we get a palindrome (775464577).

The spelling of 421331453 in words is "four hundred twenty-one million, three hundred thirty-one thousand, four hundred fifty-three".