1284345 has 12 divisors (see below), whose sum is σ = 2226276. Its totient is φ = 684960.

The previous prime is 1284341. The next prime is 1284373. The reversal of 1284345 is 5434821.

It can be written as a sum of positive squares in 2 ways, for example, as 385641 + 898704 = 621^2 + 948^2 .

It is not a de Polignac number, because 1284345 - 2² = 1284341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1284341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14226 + ... + 14315.

It is an arithmetic number, because the mean of its divisors is an integer number (185523).

2^1284345 is an apocalyptic number.

1284345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1284345 is a deficient number, since it is larger than the sum of its proper divisors (941931).

1284345 is a wasteful number, since it uses less digits than its factorization.

1284345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28552 (or 28549 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1284345 is about 1133.2894599351. The cubic root of 1284345 is about 108.6994215852.

The spelling of 1284345 in words is "one million, two hundred eighty-four thousand, three hundred forty-five".