2601543 has 24 divisors (see below), whose sum is σ = 4119168. Its totient is φ = 1430352.

The previous prime is 2601539. The next prime is 2601563. The reversal of 2601543 is 3451062.

It is a happy number.

It is not a de Polignac number, because 2601543 - 2² = 2601539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2601523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38796 + ... + 38862.

It is an arithmetic number, because the mean of its divisors is an integer number (171632).

2^2601543 is an apocalyptic number.

2601543 is a deficient number, since it is larger than the sum of its proper divisors (1517625).

2601543 is an equidigital number, since it uses as much as digits as its factorization.

2601543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2601543 is about 1612.9299426820. The cubic root of 2601543 is about 137.5340830110.

The spelling of 2601543 in words is "two million, six hundred one thousand, five hundred forty-three".