1209413 has 4 divisors (see below), whose sum is σ = 1212780. Its totient is φ = 1206048.

The previous prime is 1209379. The next prime is 1209427. The reversal of 1209413 is 3149021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3149021 = 257 ⋅12253.

It can be written as a sum of positive squares in 2 ways, for example, as 693889 + 515524 = 833^2 + 718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1209413 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 (1209463) 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, 1070 + ... + 1887.

It is an arithmetic number, because the mean of its divisors is an integer number (303195).

2^1209413 is an apocalyptic number.

It is an amenable number.

1209413 is a deficient number, since it is larger than the sum of its proper divisors (3367).

1209413 is an equidigital number, since it uses as much as digits as its factorization.

1209413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366.

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

The square root of 1209413 is about 1099.7331494504. The cubic root of 1209413 is about 106.5429892499.

The spelling of 1209413 in words is "one million, two hundred nine thousand, four hundred thirteen".