1287772 has 12 divisors (see below), whose sum is σ = 2277520. Its totient is φ = 637056.

The previous prime is 1287761. The next prime is 1287787. The reversal of 1287772 is 2777821.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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 in 3 ways as a sum of consecutive naturals, for example, 1272 + ... + 2047.

2^1287772 is an apocalyptic number.

It is an amenable number.

1287772 is a deficient number, since it is larger than the sum of its proper divisors (989748).

1287772 is a wasteful number, since it uses less digits than its factorization.

1287772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420 (or 3418 counting only the distinct ones).

The product of its digits is 10976, while the sum is 34.

The square root of 1287772 is about 1134.8004229819. The cubic root of 1287772 is about 108.7960161099.

The spelling of 1287772 in words is "one million, two hundred eighty-seven thousand, seven hundred seventy-two".