4100042 has 4 divisors (see below), whose sum is σ = 6150066. Its totient is φ = 2050020.

The previous prime is 4100023. The next prime is 4100051. The reversal of 4100042 is 2400014.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2400014 = 2 ⋅1200007.

It can be written as a sum of positive squares in only one way, i.e., 2686321 + 1413721 = 1639^2 + 1189^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4099996 and 4100032.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025009 + ... + 1025012.

Almost surely, 2^4100042 is an apocalyptic number.

4100042 is a deficient number, since it is larger than the sum of its proper divisors (2050024).

4100042 is a wasteful number, since it uses less digits than its factorization.

4100042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050023.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 4100042 is about 2024.8560442659. The cubic root of 4100042 is about 160.0526129057.

Adding to 4100042 its reverse (2400014), we get a palindrome (6500056).

The spelling of 4100042 in words is "four million, one hundred thousand, forty-two".