2546421 has 4 divisors (see below), whose sum is σ = 3395232. Its totient is φ = 1697612.

The previous prime is 2546393. The next prime is 2546429. The reversal of 2546421 is 1246452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2546421 - 2⁷ = 2546293 is a prime.

It is an Ulam number.

It is a D-number.

2546421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2546391 and 2546400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2546429) 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, 424401 + ... + 424406.

It is an arithmetic number, because the mean of its divisors is an integer number (848808).

2^2546421 is an apocalyptic number.

It is an amenable number.

2546421 is a deficient number, since it is larger than the sum of its proper divisors (848811).

2546421 is an equidigital number, since it uses as much as digits as its factorization.

2546421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848810.

The product of its digits is 1920, while the sum is 24.

The square root of 2546421 is about 1595.7509204133. The cubic root of 2546421 is about 136.5557742797. Note that the first 3 decimals are identical.

The spelling of 2546421 in words is "two million, five hundred forty-six thousand, four hundred twenty-one".