1263287 has 4 divisors (see below), whose sum is σ = 1337616. Its totient is φ = 1188960.

The previous prime is 1263263. The next prime is 1263299. The reversal of 1263287 is 7823621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1263287 - 2¹² = 1259191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37139 + ... + 37172.

It is an arithmetic number, because the mean of its divisors is an integer number (334404).

2^1263287 is an apocalyptic number.

1263287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1263287 is a deficient number, since it is larger than the sum of its proper divisors (74329).

1263287 is an equidigital number, since it uses as much as digits as its factorization.

1263287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74328.

The product of its digits is 4032, while the sum is 29.

The square root of 1263287 is about 1123.9604085554. The cubic root of 1263287 is about 108.1020697140.

The spelling of 1263287 in words is "one million, two hundred sixty-three thousand, two hundred eighty-seven".