2572643 has 4 divisors (see below), whose sum is σ = 2577288. Its totient is φ = 2568000.

The previous prime is 2572621. The next prime is 2572649. The reversal of 2572643 is 3462752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2572643 - 2¹⁰ = 2571619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2572649) 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, 1358 + ... + 2643.

It is an arithmetic number, because the mean of its divisors is an integer number (644322).

2^2572643 is an apocalyptic number.

2572643 is a deficient number, since it is larger than the sum of its proper divisors (4645).

2572643 is an equidigital number, since it uses as much as digits as its factorization.

2572643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4644.

The product of its digits is 10080, while the sum is 29.

The square root of 2572643 is about 1603.9460714126. The cubic root of 2572643 is about 137.0229062876.

It can be divided in two parts, 2572 and 643, that multiplied together give a square (1653796 = 1286²).

The spelling of 2572643 in words is "two million, five hundred seventy-two thousand, six hundred forty-three".