649541 has 2 divisors, whose sum is σ = 649542. Its totient is φ = 649540.

The previous prime is 649529. The next prime is 649559. The reversal of 649541 is 145946.

649541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 556516 + 93025 = 746^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 649541 - 2¹⁸ = 387397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324770 + 324771.

It is an arithmetic number, because the mean of its divisors is an integer number (324771).

2⁶⁴⁹⁵⁴¹ is an apocalyptic number.

It is an amenable number.

649541 is a deficient number, since it is larger than the sum of its proper divisors (1).

649541 is an equidigital number, since it uses as much as digits as its factorization.

649541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 649541 is about 805.9410648428. The cubic root of 649541 is about 86.6035157969.

The spelling of 649541 in words is "six hundred forty-nine thousand, five hundred forty-one".