7904401 has 4 divisors (see below), whose sum is σ = 7914292. Its totient is φ = 7894512.

The previous prime is 7904381. The next prime is 7904417. The reversal of 7904401 is 1044097.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5267025 + 2637376 = 2295^2 + 1624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7904401 is a prime.

It is a Duffinian number.

7904401 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7904471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3630 + ... + 5383.

It is an arithmetic number, because the mean of its divisors is an integer number (1978573).

Almost surely, 2^7904401 is an apocalyptic number.

It is an amenable number.

7904401 is a deficient number, since it is larger than the sum of its proper divisors (9891).

7904401 is an equidigital number, since it uses as much as digits as its factorization.

7904401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9890.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 7904401 is about 2811.4766582705. The cubic root of 7904401 is about 199.2001471077.

Adding to 7904401 its reverse (1044097), we get a palindrome (8948498).

The spelling of 7904401 in words is "seven million, nine hundred four thousand, four hundred one".