1264287 has 16 divisors (see below), whose sum is σ = 1790208. Its totient is φ = 792000.

The previous prime is 1264271. The next prime is 1264301. The reversal of 1264287 is 7824621.

It is not a de Polignac number, because 1264287 - 2⁴ = 1264271 is a prime.

1264287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4912 + ... + 5162.

It is an arithmetic number, because the mean of its divisors is an integer number (111888).

2^1264287 is an apocalyptic number.

1264287 is a deficient number, since it is larger than the sum of its proper divisors (525921).

1264287 is a wasteful number, since it uses less digits than its factorization.

1264287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350.

The product of its digits is 5376, while the sum is 30.

The square root of 1264287 is about 1124.4051760820. The cubic root of 1264287 is about 108.1305862105.

It can be divided in two parts, 1264 and 287, that added together give a palindrome (1551).

The spelling of 1264287 in words is "one million, two hundred sixty-four thousand, two hundred eighty-seven".