1222847539 has 4 divisors (see below), whose sum is σ = 1222917480. Its totient is φ = 1222777600.

The previous prime is 1222847537. The next prime is 1222847569. The reversal of 1222847539 is 9357482221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9357482221 = 2917 ⋅3207913.

It is a cyclic number.

It is not a de Polignac number, because 1222847539 - 2¹ = 1222847537 is a prime.

It is a super-2 number, since 2×1222847539² = 2990712207276713042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222847495 and 1222847504.

It is not an unprimeable number, because it can be changed into a prime (1222847531) 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, 17139 + ... + 52339.

It is an arithmetic number, because the mean of its divisors is an integer number (305729370).

Almost surely, 2^1222847539 is an apocalyptic number.

1222847539 is a deficient number, since it is larger than the sum of its proper divisors (69941).

1222847539 is an equidigital number, since it uses as much as digits as its factorization.

1222847539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69940.

The product of its digits is 241920, while the sum is 43.

The square root of 1222847539 is about 34969.2370377165. The cubic root of 1222847539 is about 1069.3604175505.

The spelling of 1222847539 in words is "one billion, two hundred twenty-two million, eight hundred forty-seven thousand, five hundred thirty-nine".