1421020205 has 8 divisors (see below), whose sum is σ = 1860244704. Its totient is φ = 1033469200.

The previous prime is 1421020177. The next prime is 1421020229. The reversal of 1421020205 is 5020201241.

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

It is not a de Polignac number, because 1421020205 - 2¹⁴ = 1421003821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12918311 + ... + 12918420.

It is an arithmetic number, because the mean of its divisors is an integer number (232530588).

Almost surely, 2^1421020205 is an apocalyptic number.

It is an amenable number.

1421020205 is a deficient number, since it is larger than the sum of its proper divisors (439224499).

1421020205 is a wasteful number, since it uses less digits than its factorization.

1421020205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25836747.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1421020205 is about 37696.4216471537. The cubic root of 1421020205 is about 1124.2599788377.

Adding to 1421020205 its reverse (5020201241), we get a palindrome (6441221446).

The spelling of 1421020205 in words is "one billion, four hundred twenty-one million, twenty thousand, two hundred five".