3520042 has 4 divisors (see below), whose sum is σ = 5280066. Its totient is φ = 1760020.

The previous prime is 3520021. The next prime is 3520043. The reversal of 3520042 is 2400253.

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

It can be written as a sum of positive squares in only one way, i.e., 3059001 + 461041 = 1749^2 + 679^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3519998 and 3520025.

It is not an unprimeable number, because it can be changed into a prime (3520043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 880009 + ... + 880012.

Almost surely, 2^3520042 is an apocalyptic number.

3520042 is a deficient number, since it is larger than the sum of its proper divisors (1760024).

3520042 is a wasteful number, since it uses less digits than its factorization.

3520042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760023.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 3520042 is about 1876.1774969336. The cubic root of 3520042 is about 152.1187034432.

Adding to 3520042 its reverse (2400253), we get a palindrome (5920295).

The spelling of 3520042 in words is "three million, five hundred twenty thousand, forty-two".