1283749 has 4 divisors (see below), whose sum is σ = 1290400. Its totient is φ = 1277100.

The previous prime is 1283731. The next prime is 1283753. The reversal of 1283749 is 9473821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1283749 - 2⁵ = 1283717 is a prime.

It is a super-2 number, since 2×1283749² = 3296022990002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283719) 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, 3027 + ... + 3424.

It is an arithmetic number, because the mean of its divisors is an integer number (322600).

2^1283749 is an apocalyptic number.

It is an amenable number.

1283749 is a deficient number, since it is larger than the sum of its proper divisors (6651).

1283749 is an equidigital number, since it uses as much as digits as its factorization.

1283749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6650.

The product of its digits is 12096, while the sum is 34.

The square root of 1283749 is about 1133.0264780666. The cubic root of 1283749 is about 108.6826050032.

The spelling of 1283749 in words is "one million, two hundred eighty-three thousand, seven hundred forty-nine".