421133402 has 4 divisors (see below), whose sum is σ = 631700106. Its totient is φ = 210566700.

The previous prime is 421133387. The next prime is 421133407. The reversal of 421133402 is 204331124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 399240361 + 21893041 = 19981^2 + 4679^2 .

It is not an unprimeable number, because it can be changed into a prime (421133407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105283349 + ... + 105283352.

Almost surely, 2^421133402 is an apocalyptic number.

421133402 is a deficient number, since it is larger than the sum of its proper divisors (210566704).

421133402 is a wasteful number, since it uses less digits than its factorization.

421133402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210566703.

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

The square root of 421133402 is about 20521.5350790334. The cubic root of 421133402 is about 749.5602767602.

Adding to 421133402 its reverse (204331124), we get a palindrome (625464526).

The spelling of 421133402 in words is "four hundred twenty-one million, one hundred thirty-three thousand, four hundred two".