7864081 has 16 divisors (see below), whose sum is σ = 8890560. Its totient is φ = 6912000.

The previous prime is 7864069. The next prime is 7864093. The reversal of 7864081 is 1804687.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7864069) and next prime (7864093).

It is a 3-Lehmer number, since φ(7864081) divides (7864081-1)³.

It is a cyclic number.

It is not a de Polignac number, because 7864081 - 2¹⁹ = 7339793 is a prime.

It is a super-2 number, since 2×7864081² = 123687539949122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7862081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31206 + ... + 31456.

It is an arithmetic number, because the mean of its divisors is an integer number (555660).

Almost surely, 2^7864081 is an apocalyptic number.

It is an amenable number.

7864081 is a deficient number, since it is larger than the sum of its proper divisors (1026479).

7864081 is a wasteful number, since it uses less digits than its factorization.

7864081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 7864081 is about 2804.2968815730. The cubic root of 7864081 is about 198.8608658517.

The spelling of 7864081 in words is "seven million, eight hundred sixty-four thousand, eighty-one".