7812641 has 4 divisors (see below), whose sum is σ = 7828500. Its totient is φ = 7796784.

The previous prime is 7812613. The next prime is 7812647. The reversal of 7812641 is 1462187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1462187 = 17 ⋅86011.

It can be written as a sum of positive squares in 2 ways, for example, as 4558225 + 3254416 = 2135^2 + 1804^2 .

It is a cyclic number.

It is not a de Polignac number, because 7812641 - 2⁶ = 7812577 is a prime.

It is a super-2 number, since 2×7812641² = 122074718789762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7812647) 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, 7166 + ... + 8183.

It is an arithmetic number, because the mean of its divisors is an integer number (1957125).

Almost surely, 2^7812641 is an apocalyptic number.

It is an amenable number.

7812641 is a deficient number, since it is larger than the sum of its proper divisors (15859).

7812641 is a wasteful number, since it uses less digits than its factorization.

7812641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15858.

The product of its digits is 2688, while the sum is 29.

The square root of 7812641 is about 2795.1101946077. The cubic root of 7812641 is about 198.4263252144.

The spelling of 7812641 in words is "seven million, eight hundred twelve thousand, six hundred forty-one".