1015121104 has 40 divisors (see below), whose sum is σ = 2054857320. Its totient is φ = 485184000.

The previous prime is 1015121053. The next prime is 1015121117. The reversal of 1015121104 is 4011215101.

It can be written as a sum of positive squares in 4 ways, for example, as 326163600 + 688957504 = 18060^2 + 26248^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36034 + ... + 57694.

It is an arithmetic number, because the mean of its divisors is an integer number (51371433).

Almost surely, 2^1015121104 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 1015121104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027428660).

1015121104 is an abundant number, since it is smaller than the sum of its proper divisors (1039736216).

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

1015121104 is a wasteful number, since it uses less digits than its factorization.

1015121104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21799 (or 21793 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1015121104 is about 31860.9652082293. The cubic root of 1015121104 is about 1005.0151739828.

Adding to 1015121104 its reverse (4011215101), we get a palindrome (5026336205).

The spelling of 1015121104 in words is "one billion, fifteen million, one hundred twenty-one thousand, one hundred four".