1224990205 has 8 divisors (see below), whose sum is σ = 1485143352. Its totient is φ = 969888768.

The previous prime is 1224990197. The next prime is 1224990209. The reversal of 1224990205 is 5020994221.

It can be written as a sum of positive squares in 4 ways, for example, as 194965369 + 1030024836 = 13963^2 + 32094^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1224990205 - 2³ = 1224990197 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 (1224990209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262392 + ... + 1263361.

It is an arithmetic number, because the mean of its divisors is an integer number (185642919).

Almost surely, 2^1224990205 is an apocalyptic number.

It is an amenable number.

1224990205 is a deficient number, since it is larger than the sum of its proper divisors (260153147).

1224990205 is an equidigital number, since it uses as much as digits as its factorization.

1224990205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525855.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1224990205 is about 34999.8600711489. The cubic root of 1224990205 is about 1069.9846287133.

The spelling of 1224990205 in words is "one billion, two hundred twenty-four million, nine hundred ninety thousand, two hundred five".