1200422421 has 12 divisors (see below), whose sum is σ = 1891574880. Its totient is φ = 727528680.

The previous prime is 1200422401. The next prime is 1200422429. The reversal of 1200422421 is 1242240021.

1200422421 is a `hidden beast` number, since 1 + 200 + 42 + 2 + 421 = 666.

It is not a de Polignac number, because 1200422421 - 2⁵ = 1200422389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200422394 and 1200422403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200422429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6062641 + ... + 6062838.

It is an arithmetic number, because the mean of its divisors is an integer number (157631240).

Almost surely, 2^1200422421 is an apocalyptic number.

1200422421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200422421 is a deficient number, since it is larger than the sum of its proper divisors (691152459).

1200422421 is a wasteful number, since it uses less digits than its factorization.

1200422421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12125496 (or 12125493 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1200422421 is about 34647.1127368501. The cubic root of 1200422421 is about 1062.7832460252.

Adding to 1200422421 its reverse (1242240021), we get a palindrome (2442662442).

The spelling of 1200422421 in words is "one billion, two hundred million, four hundred twenty-two thousand, four hundred twenty-one".