2547921 has 8 divisors (see below), whose sum is σ = 3506944. Its totient is φ = 1643760.

The previous prime is 2547913. The next prime is 2547929. The reversal of 2547921 is 1297452.

It is an interprime number because it is at equal distance from previous prime (2547913) and next prime (2547929).

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

It is not a de Polignac number, because 2547921 - 2³ = 2547913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2547929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13606 + ... + 13791.

It is an arithmetic number, because the mean of its divisors is an integer number (438368).

2^2547921 is an apocalyptic number.

It is an amenable number.

2547921 is a deficient number, since it is larger than the sum of its proper divisors (959023).

2547921 is a wasteful number, since it uses less digits than its factorization.

2547921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27431.

The product of its digits is 5040, while the sum is 30.

The square root of 2547921 is about 1596.2208493814. The cubic root of 2547921 is about 136.5825822917.

The spelling of 2547921 in words is "two million, five hundred forty-seven thousand, nine hundred twenty-one".