2587649 has 2 divisors, whose sum is σ = 2587650. Its totient is φ = 2587648.

The previous prime is 2587639. The next prime is 2587693. The reversal of 2587649 is 9467852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2265025 + 322624 = 1505^2 + 568^2 .

It is a cyclic number.

It is not a de Polignac number, because 2587649 - 2²⁰ = 1539073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2587609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1293824 + 1293825.

It is an arithmetic number, because the mean of its divisors is an integer number (1293825).

2^2587649 is an apocalyptic number.

It is an amenable number.

2587649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2587649 is an equidigital number, since it uses as much as digits as its factorization.

2587649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 2587649 is about 1608.6171079533. The cubic root of 2587649 is about 137.2888041503.

The spelling of 2587649 in words is "two million, five hundred eighty-seven thousand, six hundred forty-nine".