5918721 has 8 divisors (see below), whose sum is σ = 7907424. Its totient is φ = 3937920.

The previous prime is 5918699. The next prime is 5918723. The reversal of 5918721 is 1278195.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5918721 - 2⁶ = 5918657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5918723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81 + ... + 3441.

It is an arithmetic number, because the mean of its divisors is an integer number (988428).

It is a Proth number, since it is equal to 1445 ⋅ 2¹² + 1 and 1445 < 2¹².

Almost surely, 2^5918721 is an apocalyptic number.

It is an amenable number.

5918721 is a deficient number, since it is larger than the sum of its proper divisors (1988703).

5918721 is a wasteful number, since it uses less digits than its factorization.

5918721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3951.

The product of its digits is 5040, while the sum is 33.

The square root of 5918721 is about 2432.8421650407. The cubic root of 5918721 is about 180.8878052798.

The spelling of 5918721 in words is "five million, nine hundred eighteen thousand, seven hundred twenty-one".