1261384 has 16 divisors (see below), whose sum is σ = 2447100. Its totient is φ = 608832.

The previous prime is 1261373. The next prime is 1261387. The reversal of 1261384 is 4831621.

It can be written as a sum of positive squares in 2 ways, for example, as 1258884 + 2500 = 1122^2 + 50^2 .

It is not an unprimeable number, because it can be changed into a prime (1261387) 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 in 3 ways as a sum of consecutive naturals, for example, 2487 + ... + 2950.

2^1261384 is an apocalyptic number.

It is an amenable number.

1261384 is a deficient number, since it is larger than the sum of its proper divisors (1185716).

1261384 is a wasteful number, since it uses less digits than its factorization.

1261384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5472 (or 5468 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 1261384 is about 1123.1135294350. The cubic root of 1261384 is about 108.0477612255.

The spelling of 1261384 in words is "one million, two hundred sixty-one thousand, three hundred eighty-four".