1361209 has 4 divisors (see below), whose sum is σ = 1420416. Its totient is φ = 1302004.

The previous prime is 1361197. The next prime is 1361273. The reversal of 1361209 is 9021631.

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: 9021631 = 59 ⋅152909.

It is a cyclic number.

It is not a de Polignac number, because 1361209 - 2⁷ = 1361081 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1361209.

It is not an unprimeable number, because it can be changed into a prime (1361279) 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, 29569 + ... + 29614.

It is an arithmetic number, because the mean of its divisors is an integer number (355104).

2^1361209 is an apocalyptic number.

It is an amenable number.

1361209 is a deficient number, since it is larger than the sum of its proper divisors (59207).

1361209 is an equidigital number, since it uses as much as digits as its factorization.

1361209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59206.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1361209 is about 1166.7086182934. The cubic root of 1361209 is about 110.8259860331.

The spelling of 1361209 in words is "one million, three hundred sixty-one thousand, two hundred nine".