1242788 has 6 divisors (see below), whose sum is σ = 2174886. Its totient is φ = 621392.

The previous prime is 1242781. The next prime is 1242803. The reversal of 1242788 is 8872421.

It can be written as a sum of positive squares in only one way, i.e., 692224 + 550564 = 832^2 + 742^2 .

It is not an unprimeable number, because it can be changed into a prime (1242781) 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, 155345 + ... + 155352.

It is an arithmetic number, because the mean of its divisors is an integer number (362481).

2^1242788 is an apocalyptic number.

It is an amenable number.

1242788 is a deficient number, since it is larger than the sum of its proper divisors (932098).

1242788 is a wasteful number, since it uses less digits than its factorization.

1242788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310701 (or 310699 counting only the distinct ones).

The product of its digits is 7168, while the sum is 32.

The square root of 1242788 is about 1114.8040186508. The cubic root of 1242788 is about 107.5141643496.

The spelling of 1242788 in words is "one million, two hundred forty-two thousand, seven hundred eighty-eight".