1421242205 has 8 divisors (see below), whose sum is σ = 1722377304. Its totient is φ = 1125736000.

The previous prime is 1421242189. The next prime is 1421242219. The reversal of 1421242205 is 5022421241.

It can be written as a sum of positive squares in 4 ways, for example, as 636906169 + 784336036 = 25237^2 + 28006^2 .

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

It is not a de Polignac number, because 1421242205 - 2⁴ = 1421242189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1406666 + ... + 1407675.

It is an arithmetic number, because the mean of its divisors is an integer number (215297163).

Almost surely, 2^1421242205 is an apocalyptic number.

It is an amenable number.

1421242205 is a deficient number, since it is larger than the sum of its proper divisors (301135099).

1421242205 is a wasteful number, since it uses less digits than its factorization.

1421242205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814447.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1421242205 is about 37699.3661087292. The cubic root of 1421242205 is about 1124.3185219226.

Adding to 1421242205 its reverse (5022421241), we get a palindrome (6443663446).

The spelling of 1421242205 in words is "one billion, four hundred twenty-one million, two hundred forty-two thousand, two hundred five".