7921601 has 4 divisors (see below), whose sum is σ = 7951104. Its totient is φ = 7892100.

The previous prime is 7921597. The next prime is 7921607. The reversal of 7921601 is 1061297.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7921601 - 2² = 7921597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7921607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14345 + ... + 14886.

It is an arithmetic number, because the mean of its divisors is an integer number (1987776).

Almost surely, 2^7921601 is an apocalyptic number.

It is an amenable number.

7921601 is a deficient number, since it is larger than the sum of its proper divisors (29503).

7921601 is a wasteful number, since it uses less digits than its factorization.

7921601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29502.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 7921601 is about 2814.5338868097. The cubic root of 7921601 is about 199.3445291366.

Adding to 7921601 its reverse (1061297), we get a palindrome (8982898).

The spelling of 7921601 in words is "seven million, nine hundred twenty-one thousand, six hundred one".