1289741 has 4 divisors (see below), whose sum is σ = 1297632. Its totient is φ = 1281852.

The previous prime is 1289731. The next prime is 1289747. The reversal of 1289741 is 1479821.

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: 1479821 = 7 ⋅211403.

It is a cyclic number.

It is not a de Polignac number, because 1289741 - 2⁶ = 1289677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1289698 and 1289707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289747) 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 3 ways as a sum of consecutive naturals, for example, 3695 + ... + 4028.

It is an arithmetic number, because the mean of its divisors is an integer number (324408).

2^1289741 is an apocalyptic number.

It is an amenable number.

1289741 is a deficient number, since it is larger than the sum of its proper divisors (7891).

1289741 is an equidigital number, since it uses as much as digits as its factorization.

1289741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7890.

The product of its digits is 4032, while the sum is 32.

The square root of 1289741 is about 1135.6676450441. The cubic root of 1289741 is about 108.8514374806.

The spelling of 1289741 in words is "one million, two hundred eighty-nine thousand, seven hundred forty-one".