1421166120 has 128 divisors (see below), whose sum is σ = 4665600000. Its totient is φ = 343450880.

The previous prime is 1421166107. The next prime is 1421166121. The reversal of 1421166120 is 216611241.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1421166121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472381 + ... + 475379.

It is an arithmetic number, because the mean of its divisors is an integer number (36450000).

Almost surely, 2^1421166120 is an apocalyptic number.

1421166120 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 1421166120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2332800000).

1421166120 is an abundant number, since it is smaller than the sum of its proper divisors (3244433880).

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

1421166120 is a wasteful number, since it uses less digits than its factorization.

1421166120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383 (or 3379 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1421166120 is about 37698.3569933757. The cubic root of 1421166120 is about 1124.2984584173.

Adding to 1421166120 its reverse (216611241), we get a palindrome (1637777361).

The spelling of 1421166120 in words is "one billion, four hundred twenty-one million, one hundred sixty-six thousand, one hundred twenty".