1001549 has 2 divisors, whose sum is σ = 1001550. Its totient is φ = 1001548.

The previous prime is 1001531. The next prime is 1001551. The reversal of 1001549 is 9451001.

1001549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 145924 = 925^2 + 382^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001549 - 2¹² = 997453 is a prime.

Together with 1001551, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500774 + 500775.

It is an arithmetic number, because the mean of its divisors is an integer number (500775).

2^1001549 is an apocalyptic number.

It is an amenable number.

1001549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001549 is an equidigital number, since it uses as much as digits as its factorization.

1001549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1001549 is about 1000.7742003069. The cubic root of 1001549 is about 100.0516066962.

The spelling of 1001549 in words is "one million, one thousand, five hundred forty-nine".