3400042 has 4 divisors (see below), whose sum is σ = 5100066. Its totient is φ = 1700020.

The previous prime is 3399997. The next prime is 3400043. The reversal of 3400042 is 2400043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2400043 = 17 ⋅141179.

It can be written as a sum of positive squares in only one way, i.e., 2253001 + 1147041 = 1501^2 + 1071^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 3399995 and 3400031.

It is not an unprimeable number, because it can be changed into a prime (3400043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 850009 + ... + 850012.

Almost surely, 2^3400042 is an apocalyptic number.

3400042 is a deficient number, since it is larger than the sum of its proper divisors (1700024).

3400042 is a wasteful number, since it uses less digits than its factorization.

3400042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700023.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 3400042 is about 1843.9202802724. The cubic root of 3400042 is about 150.3700787863.

Adding to 3400042 its reverse (2400043), we get a palindrome (5800085).

Subtracting from 3400042 its reverse (2400043), we obtain a palindrome (999999).

The spelling of 3400042 in words is "three million, four hundred thousand, forty-two".