2563671 has 8 divisors (see below), whose sum is σ = 3729024. Its totient is φ = 1553720.

The previous prime is 2563667. The next prime is 2563679. The reversal of 2563671 is 1763652.

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 2563671 - 2² = 2563667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38811 + ... + 38876.

It is an arithmetic number, because the mean of its divisors is an integer number (466128).

2^2563671 is an apocalyptic number.

2563671 is a deficient number, since it is larger than the sum of its proper divisors (1165353).

2563671 is a wasteful number, since it uses less digits than its factorization.

2563671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77701.

The product of its digits is 7560, while the sum is 30.

The square root of 2563671 is about 1601.1467765324. The cubic root of 2563671 is about 136.8634332712.

The spelling of 2563671 in words is "two million, five hundred sixty-three thousand, six hundred seventy-one".