1000635042 has 64 divisors (see below), whose sum is σ = 2215065600. Its totient is φ = 298831680.

The previous prime is 1000635037. The next prime is 1000635047. The reversal of 1000635042 is 2405360001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1000635037) and next prime (1000635047).

It is not an unprimeable number, because it can be changed into a prime (1000635047) 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, 2640009 + ... + 2640387.

It is an arithmetic number, because the mean of its divisors is an integer number (34610400).

Almost surely, 2^1000635042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000635042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1107532800).

1000635042 is an abundant number, since it is smaller than the sum of its proper divisors (1214430558).

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

1000635042 is a wasteful number, since it uses less digits than its factorization.

1000635042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1000635042 is about 31632.8159037415. The cubic root of 1000635042 is about 1000.2116358738.

Adding to 1000635042 its reverse (2405360001), we get a palindrome (3405995043).

The spelling of 1000635042 in words is "one billion, six hundred thirty-five thousand, forty-two".