5421591 has 24 divisors (see below), whose sum is σ = 9145344. Its totient is φ = 3030480.

The previous prime is 5421587. The next prime is 5421599. The reversal of 5421591 is 1951245.

5421591 is a `hidden beast` number, since 54 + 21 + 591 = 666.

It is not a de Polignac number, because 5421591 - 2² = 5421587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5421599) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2046 + ... + 3876.

It is an arithmetic number, because the mean of its divisors is an integer number (381056).

Almost surely, 2^5421591 is an apocalyptic number.

5421591 is a deficient number, since it is larger than the sum of its proper divisors (3723753).

5421591 is a wasteful number, since it uses less digits than its factorization.

5421591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891 (or 1888 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 5421591 is about 2328.4310168008. The cubic root of 5421591 is about 175.6745772996.

The spelling of 5421591 in words is "five million, four hundred twenty-one thousand, five hundred ninety-one".