421204442 has 4 divisors (see below), whose sum is σ = 631806666. Its totient is φ = 210602220.

The previous prime is 421204417. The next prime is 421204457. The reversal of 421204442 is 244402124.

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., 407595721 + 13608721 = 20189^2 + 3689^2 .

It is a super-3 number, since 3×421204442³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105301109 + ... + 105301112.

Almost surely, 2^421204442 is an apocalyptic number.

421204442 is a deficient number, since it is larger than the sum of its proper divisors (210602224).

421204442 is a wasteful number, since it uses less digits than its factorization.

421204442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210602223.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 421204442 is about 20523.2658707137. The cubic root of 421204442 is about 749.6024215754.

Adding to 421204442 its reverse (244402124), we get a palindrome (665606566).

The spelling of 421204442 in words is "four hundred twenty-one million, two hundred four thousand, four hundred forty-two".