2591421 has 8 divisors (see below), whose sum is σ = 3948864. Its totient is φ = 1480800.

The previous prime is 2591419. The next prime is 2591441. The reversal of 2591421 is 1241952.

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

It is not a de Polignac number, because 2591421 - 2¹ = 2591419 is a prime.

2591421 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 2591391 and 2591400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61680 + ... + 61721.

It is an arithmetic number, because the mean of its divisors is an integer number (493608).

2^2591421 is an apocalyptic number.

2591421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2591421 is a deficient number, since it is larger than the sum of its proper divisors (1357443).

2591421 is a wasteful number, since it uses less digits than its factorization.

2591421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123411.

The product of its digits is 720, while the sum is 24.

The square root of 2591421 is about 1609.7891166237. The cubic root of 2591421 is about 137.3554801110.

The spelling of 2591421 in words is "two million, five hundred ninety-one thousand, four hundred twenty-one".