1220743 has 2 divisors, whose sum is σ = 1220744. Its totient is φ = 1220742.

The previous prime is 1220729. The next prime is 1220761. The reversal of 1220743 is 3470221.

It is a weak prime.

It is an emirp because it is prime and its reverse (3470221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220743 - 2⁵ = 1220711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610371 + 610372.

It is an arithmetic number, because the mean of its divisors is an integer number (610372).

2^1220743 is an apocalyptic number.

1220743 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220743 is an equidigital number, since it uses as much as digits as its factorization.

1220743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 1220743 is about 1104.8723908217. The cubic root of 1220743 is about 106.8746603503.

Adding to 1220743 its reverse (3470221), we get a palindrome (4690964).

The spelling of 1220743 in words is "one million, two hundred twenty thousand, seven hundred forty-three".