421405302 has 8 divisors (see below), whose sum is σ = 842810616. Its totient is φ = 140468432.

The previous prime is 421405291. The next prime is 421405307. The reversal of 421405302 is 203504124.

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

421405302 is an admirable number.

It is a super-2 number, since 2×421405302² = 355164857107422408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421405307) 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, 35117103 + ... + 35117114.

It is an arithmetic number, because the mean of its divisors is an integer number (105351327).

Almost surely, 2^421405302 is an apocalyptic number.

421405302 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421405302 is a wasteful number, since it uses less digits than its factorization.

421405302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70234222.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 421405302 is about 20528.1587581546. The cubic root of 421405302 is about 749.7215570833.

Adding to 421405302 its reverse (203504124), we get a palindrome (624909426).

The spelling of 421405302 in words is "four hundred twenty-one million, four hundred five thousand, three hundred two".