420012205 has 4 divisors (see below), whose sum is σ = 504014652. Its totient is φ = 336009760.

The previous prime is 420012179. The next prime is 420012239. The reversal of 420012205 is 502210024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 126472516 + 293539689 = 11246^2 + 17133^2 .

It is not a de Polignac number, because 420012205 - 2¹⁵ = 419979437 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 3 ways as a sum of consecutive naturals, for example, 42001216 + ... + 42001225.

It is an arithmetic number, because the mean of its divisors is an integer number (126003663).

Almost surely, 2^420012205 is an apocalyptic number.

It is an amenable number.

420012205 is a deficient number, since it is larger than the sum of its proper divisors (84002447).

420012205 is an equidigital number, since it uses as much as digits as its factorization.

420012205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84002446.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 420012205 is about 20494.1993012657. The cubic root of 420012205 is about 748.8944927538.

Adding to 420012205 its reverse (502210024), we get a palindrome (922222229).

The spelling of 420012205 in words is "four hundred twenty million, twelve thousand, two hundred five".