7772081 has 4 divisors (see below), whose sum is σ = 7790964. Its totient is φ = 7753200.

The previous prime is 7772059. The next prime is 7772101. The reversal of 7772081 is 1802777.

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 160000 + 7612081 = 400^2 + 2759^2 .

It is a cyclic number.

It is not a de Polignac number, because 7772081 - 2¹⁴ = 7755697 is a prime.

It is a super-2 number, since 2×7772081² = 120810486141122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7772021) 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, 8810 + ... + 9651.

It is an arithmetic number, because the mean of its divisors is an integer number (1947741).

Almost surely, 2^7772081 is an apocalyptic number.

It is an amenable number.

7772081 is a deficient number, since it is larger than the sum of its proper divisors (18883).

7772081 is a wasteful number, since it uses less digits than its factorization.

7772081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18882.

The product of its (nonzero) digits is 5488, while the sum is 32.

The square root of 7772081 is about 2787.8452252591. The cubic root of 7772081 is about 198.0823467974.

The spelling of 7772081 in words is "seven million, seven hundred seventy-two thousand, eighty-one".