1243016 has 8 divisors (see below), whose sum is σ = 2330670. Its totient is φ = 621504.

The previous prime is 1243013. The next prime is 1243093. The reversal of 1243016 is 6103421.

It can be written as a sum of positive squares in only one way, i.e., 894916 + 348100 = 946^2 + 590^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1242985 and 1243003.

It is not an unprimeable number, because it can be changed into a prime (1243013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77681 + ... + 77696.

2^1243016 is an apocalyptic number.

It is an amenable number.

1243016 is a deficient number, since it is larger than the sum of its proper divisors (1087654).

1243016 is a wasteful number, since it uses less digits than its factorization.

1243016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155383 (or 155379 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1243016 is about 1114.9062740876. The cubic root of 1243016 is about 107.5207387427.

Adding to 1243016 its reverse (6103421), we get a palindrome (7346437).

The spelling of 1243016 in words is "one million, two hundred forty-three thousand, sixteen".