7782081 has 4 divisors (see below), whose sum is σ = 10376112. Its totient is φ = 5188052.

The previous prime is 7782067. The next prime is 7782113. The reversal of 7782081 is 1802877.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1802877 = 3 ⋅600959.

It is a cyclic number.

It is not a de Polignac number, because 7782081 - 2⁶ = 7782017 is a prime.

It is a super-2 number, since 2×7782081² = 121121569381122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7782781) 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, 1297011 + ... + 1297016.

It is an arithmetic number, because the mean of its divisors is an integer number (2594028).

Almost surely, 2^7782081 is an apocalyptic number.

It is an amenable number.

7782081 is a deficient number, since it is larger than the sum of its proper divisors (2594031).

7782081 is a wasteful number, since it uses less digits than its factorization.

7782081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594030.

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 7782081 is about 2789.6381485777. The cubic root of 7782081 is about 198.1672650463.

The spelling of 7782081 in words is "seven million, seven hundred eighty-two thousand, eighty-one".