1000422120 has 128 divisors (see below), whose sum is σ = 3186915840. Its totient is φ = 250368000.

The previous prime is 1000422083. The next prime is 1000422127. The reversal of 1000422120 is 212240001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1000422096 and 1000422105.

It is not an unprimeable number, because it can be changed into a prime (1000422127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1331745 + ... + 1332495.

It is an arithmetic number, because the mean of its divisors is an integer number (24897780).

Almost surely, 2^1000422120 is an apocalyptic number.

1000422120 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 1000422120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1593457920).

1000422120 is an abundant number, since it is smaller than the sum of its proper divisors (2186493720).

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

1000422120 is a wasteful number, since it uses less digits than its factorization.

1000422120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435 (or 1431 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1000422120 is about 31629.4502007227. The cubic root of 1000422120 is about 1000.1406868729.

Adding to 1000422120 its reverse (212240001), we get a palindrome (1212662121).

The spelling of 1000422120 in words is "one billion, four hundred twenty-two thousand, one hundred twenty".