1040004042 has 64 divisors (see below), whose sum is σ = 2602810368. Its totient is φ = 269136000.

The previous prime is 1040004037. The next prime is 1040004047. The reversal of 1040004042 is 2404000401.

It is an interprime number because it is at equal distance from previous prime (1040004037) and next prime (1040004047).

It is not an unprimeable number, because it can be changed into a prime (1040004047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125817 + ... + 133827.

It is an arithmetic number, because the mean of its divisors is an integer number (40668912).

Almost surely, 2^1040004042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1040004042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1301405184).

1040004042 is an abundant number, since it is smaller than the sum of its proper divisors (1562806326).

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

1040004042 is a wasteful number, since it uses less digits than its factorization.

1040004042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8315.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1040004042 is about 32249.0936616830. The cubic root of 1040004042 is about 1013.1607163795.

Adding to 1040004042 its reverse (2404000401), we get a palindrome (3444004443).

The spelling of 1040004042 in words is "one billion, forty million, four thousand, forty-two".