421213430 has 64 divisors (see below), whose sum is σ = 862949376. Its totient is φ = 146640000.

The previous prime is 421213411. The next prime is 421213493. The reversal of 421213430 is 34312124.

It is a super-2 number, since 2×421213430² = 354841507224729800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 343799 + ... + 345021.

It is an arithmetic number, because the mean of its divisors is an integer number (13483584).

Almost surely, 2^421213430 is an apocalyptic number.

421213430 is an abundant number, since it is smaller than the sum of its proper divisors (441735946).

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

421213430 is a wasteful number, since it uses less digits than its factorization.

421213430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 421213430 is about 20523.4848405430. The cubic root of 421213430 is about 749.6077534111.

Adding to 421213430 its reverse (34312124), we get a palindrome (455525554).

The spelling of 421213430 in words is "four hundred twenty-one million, two hundred thirteen thousand, four hundred thirty".