2543401 has 4 divisors (see below), whose sum is σ = 2906752. Its totient is φ = 2180052.

The previous prime is 2543399. The next prime is 2543413. The reversal of 2543401 is 1043452.

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 not a de Polignac number, because 2543401 - 2¹ = 2543399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2543441) 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, 181665 + ... + 181678.

It is an arithmetic number, because the mean of its divisors is an integer number (726688).

2^2543401 is an apocalyptic number.

It is an amenable number.

2543401 is a deficient number, since it is larger than the sum of its proper divisors (363351).

2543401 is an equidigital number, since it uses as much as digits as its factorization.

2543401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363350.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 2543401 is about 1594.8043767183. The cubic root of 2543401 is about 136.5017688635.

Adding to 2543401 its reverse (1043452), we get a palindrome (3586853).

It can be divided in two parts, 254 and 3401, that added together give a triangular number (3655 = T₈₅).

The spelling of 2543401 in words is "two million, five hundred forty-three thousand, four hundred one".