1264789 has 4 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 1259500.

The previous prime is 1264787. The next prime is 1264801. The reversal of 1264789 is 9874621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9874621 = 281 ⋅35141.

It is a cyclic number.

It is not a de Polignac number, because 1264789 - 2¹ = 1264787 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 (1264787) 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, 2269 + ... + 2770.

It is an arithmetic number, because the mean of its divisors is an integer number (317520).

2^1264789 is an apocalyptic number.

It is an amenable number.

1264789 is a deficient number, since it is larger than the sum of its proper divisors (5291).

1264789 is an equidigital number, since it uses as much as digits as its factorization.

1264789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5290.

The product of its digits is 24192, while the sum is 37.

The square root of 1264789 is about 1124.6283830670. The cubic root of 1264789 is about 108.1448958231.

The spelling of 1264789 in words is "one million, two hundred sixty-four thousand, seven hundred eighty-nine".