1264887 has 24 divisors (see below), whose sum is σ = 2074800. Its totient is φ = 736128.

The previous prime is 1264883. The next prime is 1264889. The reversal of 1264887 is 7884621.

1264887 is a `hidden beast` number, since 1 + 2 + 648 + 8 + 7 = 666.

It is not a de Polignac number, because 1264887 - 2² = 1264883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1939 + ... + 2507.

It is an arithmetic number, because the mean of its divisors is an integer number (86450).

2^1264887 is an apocalyptic number.

1264887 is a deficient number, since it is larger than the sum of its proper divisors (809913).

1264887 is a wasteful number, since it uses less digits than its factorization.

1264887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607 (or 604 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 1264887 is about 1124.6719521709. The cubic root of 1264887 is about 108.1476888914.

The spelling of 1264887 in words is "one million, two hundred sixty-four thousand, eight hundred eighty-seven".