1243964 has 12 divisors (see below), whose sum is σ = 2186184. Its totient is φ = 619344.

The previous prime is 1243961. The next prime is 1243967. The reversal of 1243964 is 4693421.

It is an interprime number because it is at equal distance from previous prime (1243961) and next prime (1243967).

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722 + ... + 1734.

It is an arithmetic number, because the mean of its divisors is an integer number (182182).

2^1243964 is an apocalyptic number.

It is an amenable number.

1243964 is a deficient number, since it is larger than the sum of its proper divisors (942220).

1243964 is a wasteful number, since it uses less digits than its factorization.

1243964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324 (or 1322 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 1243964 is about 1115.3313409028. The cubic root of 1243964 is about 107.5480657598.

It can be divided in two parts, 124 and 3964, that multiplied together give a triangular number (491536 = T₉₉₁).

The spelling of 1243964 in words is "one million, two hundred forty-three thousand, nine hundred sixty-four".