1242772 has 6 divisors (see below), whose sum is σ = 2174858. Its totient is φ = 621384.

The previous prime is 1242767. The next prime is 1242781. The reversal of 1242772 is 2772421.

It can be written as a sum of positive squares in only one way, i.e., 1052676 + 190096 = 1026^2 + 436^2 .

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

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, 155343 + ... + 155350.

2^1242772 is an apocalyptic number.

It is an amenable number.

1242772 is a deficient number, since it is larger than the sum of its proper divisors (932086).

1242772 is a wasteful number, since it uses less digits than its factorization.

1242772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310697 (or 310695 counting only the distinct ones).

The product of its digits is 1568, while the sum is 25.

The square root of 1242772 is about 1114.7968424785. The cubic root of 1242772 is about 107.5137029585.

The spelling of 1242772 in words is "one million, two hundred forty-two thousand, seven hundred seventy-two".