7917641 has 4 divisors (see below), whose sum is σ = 7975572. Its totient is φ = 7859712.

The previous prime is 7917607. The next prime is 7917647. The reversal of 7917641 is 1467197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1467197 = 29 ⋅50593.

It can be written as a sum of positive squares in 2 ways, for example, as 5290000 + 2627641 = 2300^2 + 1621^2 .

It is a cyclic number.

It is not a de Polignac number, because 7917641 - 2⁶ = 7917577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7917647) 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, 28760 + ... + 29033.

It is an arithmetic number, because the mean of its divisors is an integer number (1993893).

Almost surely, 2^7917641 is an apocalyptic number.

It is an amenable number.

7917641 is a deficient number, since it is larger than the sum of its proper divisors (57931).

7917641 is a wasteful number, since it uses less digits than its factorization.

7917641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57930.

The product of its digits is 10584, while the sum is 35.

The square root of 7917641 is about 2813.8303076056. The cubic root of 7917641 is about 199.3113062265.

It can be divided in two parts, 7917 and 641, that added together give a palindrome (8558).

The spelling of 7917641 in words is "seven million, nine hundred seventeen thousand, six hundred forty-one".