1309241 has 4 divisors (see below), whose sum is σ = 1318800. Its totient is φ = 1299684.

The previous prime is 1309237. The next prime is 1309249. The reversal of 1309241 is 1429031.

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: 1429031 = 79 ⋅18089.

It is a cyclic number.

It is not a de Polignac number, because 1309241 - 2² = 1309237 is a prime.

It is a super-2 number, since 2×1309241² = 3428223992162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1309249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4571 + ... + 4848.

It is an arithmetic number, because the mean of its divisors is an integer number (329700).

2^1309241 is an apocalyptic number.

It is an amenable number.

1309241 is a deficient number, since it is larger than the sum of its proper divisors (9559).

1309241 is an equidigital number, since it uses as much as digits as its factorization.

1309241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9558.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1309241 is about 1144.2206954954. The cubic root of 1309241 is about 109.3972820998.

The spelling of 1309241 in words is "one million, three hundred nine thousand, two hundred forty-one".