2102434042 has 4 divisors (see below), whose sum is σ = 3153651066. Its totient is φ = 1051217020.

The previous prime is 2102434027. The next prime is 2102434057. The reversal of 2102434042 is 2404342012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2102434027) and next prime (2102434057).

It can be written as a sum of positive squares in only one way, i.e., 1415941641 + 686492401 = 37629^2 + 26201^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 525608509 + ... + 525608512.

Almost surely, 2^2102434042 is an apocalyptic number.

2102434042 is a deficient number, since it is larger than the sum of its proper divisors (1051217024).

2102434042 is a wasteful number, since it uses less digits than its factorization.

2102434042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051217023.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 2102434042 is about 45852.3068340078. The cubic root of 2102434042 is about 1281.0737332386.

Adding to 2102434042 its reverse (2404342012), we get a palindrome (4506776054).

The spelling of 2102434042 in words is "two billion, one hundred two million, four hundred thirty-four thousand, forty-two".