1206422100 has 504 divisors, whose sum is σ = 4515926240. Its totient is φ = 277136640.

The previous prime is 1206422083. The next prime is 1206422101. The reversal of 1206422100 is 12246021.

1206422100 = T₂₆₁ + T₂₆₂ + ... + T₁₉₃₅.

1206422100 is a `hidden beast` number, since 1 + 2 + 0 + 642 + 21 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206422101) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 18006267 + ... + 18006333.

Almost surely, 2^1206422100 is an apocalyptic number.

1206422100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1206422100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2257963120).

1206422100 is an abundant number, since it is smaller than the sum of its proper divisors (3309504140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1206422100 is a wasteful number, since it uses less digits than its factorization.

1206422100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1206422100 is about 34733.5874910727. The cubic root of 1206422100 is about 1064.5508917733.

Adding to 1206422100 its reverse (12246021), we get a palindrome (1218668121).

The spelling of 1206422100 in words is "one billion, two hundred six million, four hundred twenty-two thousand, one hundred".