1051021004 has 72 divisors (see below), whose sum is σ = 2073433824. Its totient is φ = 465696000.

The previous prime is 1051020983. The next prime is 1051021009. The reversal of 1051021004 is 4001201501.

It is a super-2 number, since 2×1051021004² = 2209290301698336032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1051021004.

It is not an unprimeable number, because it can be changed into a prime (1051021009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5335034 + ... + 5335230.

It is an arithmetic number, because the mean of its divisors is an integer number (28797692).

Almost surely, 2^1051021004 is an apocalyptic number.

It is an amenable number.

1051021004 is a deficient number, since it is larger than the sum of its proper divisors (1022412820).

1051021004 is a wasteful number, since it uses less digits than its factorization.

1051021004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1051021004 is about 32419.4540978099. The cubic root of 1051021004 is about 1016.7256928673.

Adding to 1051021004 its reverse (4001201501), we get a palindrome (5052222505).

The spelling of 1051021004 in words is "one billion, fifty-one million, twenty-one thousand, four".