1243963 has 12 divisors (see below), whose sum is σ = 1477440. Its totient is φ = 1043952.

The previous prime is 1243961. The next prime is 1243967. The reversal of 1243963 is 3693421.

It is not a de Polignac number, because 1243963 - 2¹ = 1243961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243961) 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, 2358 + ... + 2836.

It is an arithmetic number, because the mean of its divisors is an integer number (123120).

2^1243963 is an apocalyptic number.

1243963 is a deficient number, since it is larger than the sum of its proper divisors (233477).

1243963 is an equidigital number, since it uses as much as digits as its factorization.

1243963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 539 counting only the distinct ones).

The product of its digits is 3888, while the sum is 28.

The square root of 1243963 is about 1115.3308926054. The cubic root of 1243963 is about 107.5480369412.

The spelling of 1243963 in words is "one million, two hundred forty-three thousand, nine hundred sixty-three".