2572639 has 8 divisors (see below), whose sum is σ = 2654208. Its totient is φ = 2492280.

The previous prime is 2572621. The next prime is 2572649. The reversal of 2572639 is 9362752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2572639 - 2⁵ = 2572607 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 5754 + ... + 6184.

It is an arithmetic number, because the mean of its divisors is an integer number (331776).

2^2572639 is an apocalyptic number.

2572639 is a deficient number, since it is larger than the sum of its proper divisors (81569).

2572639 is a wasteful number, since it uses less digits than its factorization.

2572639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605.

The product of its digits is 22680, while the sum is 34.

The square root of 2572639 is about 1603.9448244874. The cubic root of 2572639 is about 137.0228352722.

The spelling of 2572639 in words is "two million, five hundred seventy-two thousand, six hundred thirty-nine".