421440410 has 8 divisors (see below), whose sum is σ = 758592756. Its totient is φ = 168576160.

The previous prime is 421440407. The next prime is 421440419. The reversal of 421440410 is 14044124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 410832361 + 10608049 = 20269^2 + 3257^2 .

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

It is a super-2 number, since 2×421440410² = 355224038361936200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421440419) 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, 21072011 + ... + 21072030.

Almost surely, 2^421440410 is an apocalyptic number.

421440410 is a deficient number, since it is larger than the sum of its proper divisors (337152346).

421440410 is a wasteful number, since it uses less digits than its factorization.

421440410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42144048.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 421440410 is about 20529.0138584395. The cubic root of 421440410 is about 749.7423767023.

Adding to 421440410 its reverse (14044124), we get a palindrome (435484534).

The spelling of 421440410 in words is "four hundred twenty-one million, four hundred forty thousand, four hundred ten".