1264389 has 8 divisors (see below), whose sum is σ = 1926720. Its totient is φ = 722496.

The previous prime is 1264387. The next prime is 1264411. The reversal of 1264389 is 9834621.

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

It is not a de Polignac number, because 1264389 - 2¹ = 1264387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30084 + ... + 30125.

It is an arithmetic number, because the mean of its divisors is an integer number (240840).

2^1264389 is an apocalyptic number.

It is an amenable number.

1264389 is a deficient number, since it is larger than the sum of its proper divisors (662331).

1264389 is an equidigital number, since it uses as much as digits as its factorization.

1264389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60219.

The product of its digits is 10368, while the sum is 33.

The square root of 1264389 is about 1124.4505324824. The cubic root of 1264389 is about 108.1334940480.

It can be divided in two parts, 1264 and 389, that added together give a triangular number (1653 = T₅₇).

The spelling of 1264389 in words is "one million, two hundred sixty-four thousand, three hundred eighty-nine".