7804207042 has 4 divisors (see below), whose sum is σ = 11706310566. Its totient is φ = 3902103520.

The previous prime is 7804207009. The next prime is 7804207069. The reversal of 7804207042 is 2407024087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2407024087 = 13 ⋅185155699.

It can be written as a sum of positive squares in only one way, i.e., 4753964601 + 3050242441 = 68949^2 + 55229^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7804206989 and 7804207007.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1951051759 + ... + 1951051762.

Almost surely, 2^7804207042 is an apocalyptic number.

7804207042 is a deficient number, since it is larger than the sum of its proper divisors (3902103524).

7804207042 is a wasteful number, since it uses less digits than its factorization.

7804207042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902103523.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 7804207042 is about 88341.4231377331. The cubic root of 7804207042 is about 1983.5489730431.

The spelling of 7804207042 in words is "seven billion, eight hundred four million, two hundred seven thousand, forty-two".