421641451 has 16 divisors (see below), whose sum is σ = 548540928. Its totient is φ = 314265600.

The previous prime is 421641439. The next prime is 421641457. The reversal of 421641451 is 154146124.

It is not a de Polignac number, because 421641451 - 2⁵ = 421641419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421641457) 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, 117270 + ... + 120811.

It is an arithmetic number, because the mean of its divisors is an integer number (34283808).

Almost surely, 2^421641451 is an apocalyptic number.

421641451 is a deficient number, since it is larger than the sum of its proper divisors (126899477).

421641451 is a wasteful number, since it uses less digits than its factorization.

421641451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238122.

The product of its digits is 3840, while the sum is 28.

The square root of 421641451 is about 20533.9097835751. The cubic root of 421641451 is about 749.8615750455.

Adding to 421641451 its reverse (154146124), we get a palindrome (575787575).

The spelling of 421641451 in words is "four hundred twenty-one million, six hundred forty-one thousand, four hundred fifty-one".