1200420422 has 16 divisors (see below), whose sum is σ = 1950890832. Its totient is φ = 551765760.

The previous prime is 1200420407. The next prime is 1200420433. The reversal of 1200420422 is 2240240021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1200420422.

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, 409079 + ... + 412002.

It is an arithmetic number, because the mean of its divisors is an integer number (121930677).

Almost surely, 2^1200420422 is an apocalyptic number.

1200420422 is a deficient number, since it is larger than the sum of its proper divisors (750470410).

1200420422 is a wasteful number, since it uses less digits than its factorization.

1200420422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821143.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1200420422 is about 34647.0838888354. The cubic root of 1200420422 is about 1062.7826560927.

Adding to 1200420422 its reverse (2240240021), we get a palindrome (3440660443).

The spelling of 1200420422 in words is "one billion, two hundred million, four hundred twenty thousand, four hundred twenty-two".