1209479 has 4 divisors (see below), whose sum is σ = 1213680. Its totient is φ = 1205280.

The previous prime is 1209469. The next prime is 1209487. The reversal of 1209479 is 9749021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9749021 = 41 ⋅237781.

It is a cyclic number.

It is not a de Polignac number, because 1209479 - 2⁴ = 1209463 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209469) 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, 1634 + ... + 2255.

It is an arithmetic number, because the mean of its divisors is an integer number (303420).

2^1209479 is an apocalyptic number.

1209479 is a deficient number, since it is larger than the sum of its proper divisors (4201).

1209479 is an equidigital number, since it uses as much as digits as its factorization.

1209479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4200.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1209479 is about 1099.7631563205. The cubic root of 1209479 is about 106.5449273002.

The spelling of 1209479 in words is "one million, two hundred nine thousand, four hundred seventy-nine".