1549481 has 2 divisors, whose sum is σ = 1549482. Its totient is φ = 1549480.

The previous prime is 1549477. The next prime is 1549489. The reversal of 1549481 is 1849451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1537600 + 11881 = 1240^2 + 109^2 .

It is an emirp because it is prime and its reverse (1849451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1549481 - 2² = 1549477 is a prime.

It is a super-2 number, since 2×1549481² = 4801782738722, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1549489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 774740 + 774741.

It is an arithmetic number, because the mean of its divisors is an integer number (774741).

2^1549481 is an apocalyptic number.

It is an amenable number.

1549481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1549481 is an equidigital number, since it uses as much as digits as its factorization.

1549481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 1549481 is about 1244.7815069320. The cubic root of 1549481 is about 115.7165343841.

The spelling of 1549481 in words is "one million, five hundred forty-nine thousand, four hundred eighty-one".