421210453 has 4 divisors (see below), whose sum is σ = 421255980. Its totient is φ = 421164928.

The previous prime is 421210421. The next prime is 421210481. The reversal of 421210453 is 354012124.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 255264529 + 165945924 = 15977^2 + 12882^2 .

It is a cyclic number.

It is not a de Polignac number, because 421210453 - 2⁵ = 421210421 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 (421210483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3388 + ... + 29221.

It is an arithmetic number, because the mean of its divisors is an integer number (105313995).

Almost surely, 2^421210453 is an apocalyptic number.

It is an amenable number.

421210453 is a deficient number, since it is larger than the sum of its proper divisors (45527).

421210453 is a wasteful number, since it uses less digits than its factorization.

421210453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45526.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 421210453 is about 20523.4123137455. The cubic root of 421210453 is about 749.6059874121.

Adding to 421210453 its reverse (354012124), we get a palindrome (775222577).

The spelling of 421210453 in words is "four hundred twenty-one million, two hundred ten thousand, four hundred fifty-three".