1242783 has 20 divisors (see below), whose sum is σ = 1892440. Its totient is φ = 812592.

The previous prime is 1242781. The next prime is 1242803. The reversal of 1242783 is 3872421.

It is not a de Polignac number, because 1242783 - 2¹ = 1242781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242781) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5313 + ... + 5541.

It is an arithmetic number, because the mean of its divisors is an integer number (94622).

2^1242783 is an apocalyptic number.

1242783 is a deficient number, since it is larger than the sum of its proper divisors (649657).

1242783 is an equidigital number, since it uses as much as digits as its factorization.

1242783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 299 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 1242783 is about 1114.8017761019. The cubic root of 1242783 is about 107.5140201653.

It can be divided in two parts, 1242 and 783, that added together give a square (2025 = 45²).

The spelling of 1242783 in words is "one million, two hundred forty-two thousand, seven hundred eighty-three".