421204463 has 4 divisors (see below), whose sum is σ = 421844280. Its totient is φ = 420564648.

The previous prime is 421204457. The next prime is 421204493. The reversal of 421204463 is 364402124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421204463 is a prime.

It is a super-2 number, since 2×421204463² = 354826399302236738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421204493) 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, 318920 + ... + 320237.

It is an arithmetic number, because the mean of its divisors is an integer number (105461070).

Almost surely, 2^421204463 is an apocalyptic number.

421204463 is a deficient number, since it is larger than the sum of its proper divisors (639817).

421204463 is an equidigital number, since it uses as much as digits as its factorization.

421204463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639816.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 421204463 is about 20523.2663823281. The cubic root of 421204463 is about 749.6024340330.

Adding to 421204463 its reverse (364402124), we get a palindrome (785606587).

The spelling of 421204463 in words is "four hundred twenty-one million, two hundred four thousand, four hundred sixty-three".