2549421 has 48 divisors (see below), whose sum is σ = 4596480. Its totient is φ = 1391040.

The previous prime is 2549387. The next prime is 2549423. The reversal of 2549421 is 1249452.

It is not a de Polignac number, because 2549421 - 2⁶ = 2549357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2549423) 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 47 ways as a sum of consecutive naturals, for example, 54220 + ... + 54266.

It is an arithmetic number, because the mean of its divisors is an integer number (95760).

2^2549421 is an apocalyptic number.

2549421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2549421 is a deficient number, since it is larger than the sum of its proper divisors (2047059).

2549421 is a wasteful number, since it uses less digits than its factorization.

2549421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 98 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2549421 is about 1596.6906400427. The cubic root of 2549421 is about 136.6093797843.

The spelling of 2549421 in words is "two million, five hundred forty-nine thousand, four hundred twenty-one".