1013021004 has 24 divisors (see below), whose sum is σ = 2418687040. Its totient is φ = 329820624.

The previous prime is 1013021003. The next prime is 1013021021. The reversal of 1013021004 is 4001203101.

It is a happy number.

1013021004 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 (12).

It is not an unprimeable number, because it can be changed into a prime (1013021003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 981094 + ... + 982125.

Almost surely, 2^1013021004 is an apocalyptic number.

It is an amenable number.

1013021004 is an abundant number, since it is smaller than the sum of its proper divisors (1405666036).

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

1013021004 is a wasteful number, since it uses less digits than its factorization.

1013021004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963269 (or 1963267 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1013021004 is about 31827.9908885245. The cubic root of 1013021004 is about 1004.3216312656.

Adding to 1013021004 its reverse (4001203101), we get a palindrome (5014224105).

The spelling of 1013021004 in words is "one billion, thirteen million, twenty-one thousand, four".