2649571 has 4 divisors (see below), whose sum is σ = 2653144. Its totient is φ = 2646000.

The previous prime is 2649557. The next prime is 2649587. The reversal of 2649571 is 1759462.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 4-Lehmer number, since φ(2649571) divides (2649571-1)⁴.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2649571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2649541) 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, 210 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (663286).

2^2649571 is an apocalyptic number.

2649571 is a deficient number, since it is larger than the sum of its proper divisors (3573).

2649571 is a wasteful number, since it uses less digits than its factorization.

2649571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572.

The product of its digits is 15120, while the sum is 34.

The square root of 2649571 is about 1627.7502879742. The cubic root of 2649571 is about 138.3752825149.

The spelling of 2649571 in words is "two million, six hundred forty-nine thousand, five hundred seventy-one".