1000121544 has 96 divisors (see below), whose sum is σ = 2928432000. Its totient is φ = 307276416.

The previous prime is 1000121539. The next prime is 1000121587. The reversal of 1000121544 is 4451210001.

1000121544 is a `hidden beast` number, since 1 + 0 + 0 + 0 + 121 + 544 = 666.

1000121544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40737 + ... + 60495.

It is an arithmetic number, because the mean of its divisors is an integer number (30504500).

Almost surely, 2^1000121544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000121544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464216000).

1000121544 is an abundant number, since it is smaller than the sum of its proper divisors (1928310456).

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

1000121544 is a wasteful number, since it uses less digits than its factorization.

1000121544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19827 (or 19820 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1000121544 is about 31624.6983226718. The cubic root of 1000121544 is about 1000.0405130253.

Adding to 1000121544 its reverse (4451210001), we get a palindrome (5451331545).

The spelling of 1000121544 in words is "one billion, one hundred twenty-one thousand, five hundred forty-four".