421046621 has 8 divisors (see below), whose sum is σ = 438748920. Its totient is φ = 403556608.

The previous prime is 421046609. The next prime is 421046623. The reversal of 421046621 is 126640124.

It can be written as a sum of positive squares in 4 ways, for example, as 79905721 + 341140900 = 8939^2 + 18470^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421046621 - 2¹⁸ = 420784477 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 (421046623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49016 + ... + 56961.

It is an arithmetic number, because the mean of its divisors is an integer number (54843615).

Almost surely, 2^421046621 is an apocalyptic number.

It is an amenable number.

421046621 is a deficient number, since it is larger than the sum of its proper divisors (17702299).

421046621 is a wasteful number, since it uses less digits than its factorization.

421046621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106143.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 421046621 is about 20519.4205814882. The cubic root of 421046621 is about 749.5087870908.

Adding to 421046621 its reverse (126640124), we get a palindrome (547686745).

The spelling of 421046621 in words is "four hundred twenty-one million, forty-six thousand, six hundred twenty-one".