1263387 has 8 divisors (see below), whose sum is σ = 1690704. Its totient is φ = 839168.

The previous prime is 1263377. The next prime is 1263391. The reversal of 1263387 is 7833621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1263387 - 2⁶ = 1263323 is a prime.

It is a super-2 number, since 2×1263387² = 3192293423538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1263307) 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 in 7 ways as a sum of consecutive naturals, for example, 463 + ... + 1655.

It is an arithmetic number, because the mean of its divisors is an integer number (211338).

2^1263387 is an apocalyptic number.

1263387 is a deficient number, since it is larger than the sum of its proper divisors (427317).

1263387 is a wasteful number, since it uses less digits than its factorization.

1263387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549.

The product of its digits is 6048, while the sum is 30.

The square root of 1263387 is about 1124.0048932278. The cubic root of 1263387 is about 108.1049220407.

It can be divided in two parts, 12633 and 87, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 1263387 in words is "one million, two hundred sixty-three thousand, three hundred eighty-seven".