7911481 has 4 divisors (see below), whose sum is σ = 7934500. Its totient is φ = 7888464.

The previous prime is 7911457. The next prime is 7911503. The reversal of 7911481 is 1841197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1841197 = 227 ⋅8111.

It can be written as a sum of positive squares in 2 ways, for example, as 6943225 + 968256 = 2635^2 + 984^2 .

It is a cyclic number.

It is not a de Polignac number, because 7911481 - 2¹⁵ = 7878713 is a prime.

It is a super-2 number, since 2×7911481² = 125183063226722, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (7911781) 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, 10986 + ... + 11683.

It is an arithmetic number, because the mean of its divisors is an integer number (1983625).

Almost surely, 2^7911481 is an apocalyptic number.

It is an amenable number.

7911481 is a deficient number, since it is larger than the sum of its proper divisors (23019).

7911481 is a wasteful number, since it uses less digits than its factorization.

7911481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23018.

The product of its digits is 2016, while the sum is 31.

The square root of 7911481 is about 2812.7355012514. The cubic root of 7911481 is about 199.2596041187.

The spelling of 7911481 in words is "seven million, nine hundred eleven thousand, four hundred eighty-one".