421212402 has 48 divisors (see below), whose sum is σ = 1003766400. Its totient is φ = 126842976.

The previous prime is 421212401. The next prime is 421212419. The reversal of 421212402 is 204212124.

421212402 is a `hidden beast` number, since 421 + 2 + 1 + 240 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (421212401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8152 + ... + 30147.

It is an arithmetic number, because the mean of its divisors is an integer number (20911800).

Almost surely, 2^421212402 is an apocalyptic number.

421212402 is an abundant number, since it is smaller than the sum of its proper divisors (582553998).

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

421212402 is a wasteful number, since it uses less digits than its factorization.

421212402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38367 (or 38364 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 421212402 is about 20523.4597960480. The cubic root of 421212402 is about 749.6071435877.

Adding to 421212402 its reverse (204212124), we get a palindrome (625424526).

The spelling of 421212402 in words is "four hundred twenty-one million, two hundred twelve thousand, four hundred two".