2538921 has 32 divisors (see below), whose sum is σ = 4377600. Its totient is φ = 1270080.

The previous prime is 2538919. The next prime is 2538953. The reversal of 2538921 is 1298352.

It is a happy number.

It is not a de Polignac number, because 2538921 - 2¹ = 2538919 is a prime.

It is a super-2 number, since 2×2538921² = 12892239688482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2538971) 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 31 ways as a sum of consecutive naturals, for example, 6510 + ... + 6888.

It is an arithmetic number, because the mean of its divisors is an integer number (136800).

2^2538921 is an apocalyptic number.

2538921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2538921 is a deficient number, since it is larger than the sum of its proper divisors (1838679).

2538921 is a wasteful number, since it uses less digits than its factorization.

2538921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429.

The product of its digits is 4320, while the sum is 30.

The square root of 2538921 is about 1593.3991966861. The cubic root of 2538921 is about 136.4215760653.

The spelling of 2538921 in words is "two million, five hundred thirty-eight thousand, nine hundred twenty-one".