1284149 has 4 divisors (see below), whose sum is σ = 1328460. Its totient is φ = 1239840.

The previous prime is 1284131. The next prime is 1284169. The reversal of 1284149 is 9414821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 465124 + 819025 = 682^2 + 905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1284149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 44281 = 1284149 / (1 + 2 + 8 + 4 + 1 + 4 + 9).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22112 + ... + 22169.

It is an arithmetic number, because the mean of its divisors is an integer number (332115).

2^1284149 is an apocalyptic number.

It is an amenable number.

1284149 is a deficient number, since it is larger than the sum of its proper divisors (44311).

1284149 is an equidigital number, since it uses as much as digits as its factorization.

1284149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44310.

The product of its digits is 2304, while the sum is 29.

The square root of 1284149 is about 1133.2029826999. The cubic root of 1284149 is about 108.6938918741.

The spelling of 1284149 in words is "one million, two hundred eighty-four thousand, one hundred forty-nine".