2638571 has 4 divisors (see below), whose sum is σ = 2841552. Its totient is φ = 2435592.

The previous prime is 2638567. The next prime is 2638579. The reversal of 2638571 is 1758362.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1758362 = 2 ⋅879181.

It is a cyclic number.

It is not a de Polignac number, because 2638571 - 2² = 2638567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2638579) 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, 101471 + ... + 101496.

It is an arithmetic number, because the mean of its divisors is an integer number (710388).

2^2638571 is an apocalyptic number.

2638571 is a deficient number, since it is larger than the sum of its proper divisors (202981).

2638571 is a wasteful number, since it uses less digits than its factorization.

2638571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202980.

The product of its digits is 10080, while the sum is 32.

The square root of 2638571 is about 1624.3678770525. The cubic root of 2638571 is about 138.1835232440.

The spelling of 2638571 in words is "two million, six hundred thirty-eight thousand, five hundred seventy-one".