1264039 has 8 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 1078296.

The previous prime is 1264037. The next prime is 1264049. The reversal of 1264039 is 9304621.

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 1264039 - 2¹ = 1264037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264033) 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, 2262 + ... + 2764.

It is an arithmetic number, because the mean of its divisors is an integer number (181440).

2^1264039 is an apocalyptic number.

1264039 is a deficient number, since it is larger than the sum of its proper divisors (187481).

1264039 is an equidigital number, since it uses as much as digits as its factorization.

1264039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1264039 is about 1124.2948901423. The cubic root of 1264039 is about 108.1235155220.

The spelling of 1264039 in words is "one million, two hundred sixty-four thousand, thirty-nine".