1243968 has 112 divisors (see below), whose sum is σ = 3901440. Its totient is φ = 345600.

The previous prime is 1243967. The next prime is 1243969. The reversal of 1243968 is 8693421.

It is an interprime number because it is at equal distance from previous prime (1243967) and next prime (1243969).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 40113 + ... + 40143.

2^1243968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1950720).

1243968 is an abundant number, since it is smaller than the sum of its proper divisors (2657472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1243968 is a wasteful number, since it uses less digits than its factorization.

1243968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 66 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 1243968 is about 1115.3331340904. Note that the first 3 decimals coincide. The cubic root of 1243968 is about 107.5481810343.

It can be divided in two parts, 1243 and 968, that added together give a triangular number (2211 = T₆₆).

The spelling of 1243968 in words is "one million, two hundred forty-three thousand, nine hundred sixty-eight".