1287796 has 6 divisors (see below), whose sum is σ = 2253650. Its totient is φ = 643896.

The previous prime is 1287787. The next prime is 1287799. The reversal of 1287796 is 6977821.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 55696 = 1110^2 + 236^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287799) 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, 160971 + ... + 160978.

2^1287796 is an apocalyptic number.

It is an amenable number.

1287796 is a deficient number, since it is larger than the sum of its proper divisors (965854).

1287796 is a wasteful number, since it uses less digits than its factorization.

1287796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321953 (or 321951 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 1287796 is about 1134.8109974793. The cubic root of 1287796 is about 108.7966919770.

The spelling of 1287796 in words is "one million, two hundred eighty-seven thousand, seven hundred ninety-six".