1100100042 has 20 divisors (see below), whose sum is σ = 2465039346. Its totient is φ = 366699960.

The previous prime is 1100100041. The next prime is 1100100061. The reversal of 1100100042 is 2400010011.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 924828921 + 175271121 = 30411^2 + 13239^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1100099997 and 1100100033.

It is not an unprimeable number, because it can be changed into a prime (1100100041) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3395209 + ... + 3395532.

Almost surely, 2^1100100042 is an apocalyptic number.

1100100042 is an abundant number, since it is smaller than the sum of its proper divisors (1364939304).

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

1100100042 is an equidigital number, since it uses as much as digits as its factorization.

1100100042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6790755 (or 6790746 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1100100042 is about 33167.7560591608. The cubic root of 1100100042 is about 1032.3114088614.

Adding to 1100100042 its reverse (2400010011), we get a palindrome (3500110053).

The spelling of 1100100042 in words is "one billion, one hundred million, one hundred thousand, forty-two".