1225664843 has 8 divisors (see below), whose sum is σ = 1320381888. Its totient is φ = 1131009984.

The previous prime is 1225664837. The next prime is 1225664873. The reversal of 1225664843 is 3484665221.

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

It is not a de Polignac number, because 1225664843 - 2¹⁰ = 1225663819 is a prime.

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 1225664843.

It is not an unprimeable number, because it can be changed into a prime (1225664833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30455 + ... + 58127.

It is an arithmetic number, because the mean of its divisors is an integer number (165047736).

Almost surely, 2^1225664843 is an apocalyptic number.

1225664843 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1225664843 is a deficient number, since it is larger than the sum of its proper divisors (94717045).

1225664843 is a wasteful number, since it uses less digits than its factorization.

1225664843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31093.

The product of its digits is 276480, while the sum is 41.

The square root of 1225664843 is about 35009.4964688154. The cubic root of 1225664843 is about 1070.1810166279.

The spelling of 1225664843 in words is "one billion, two hundred twenty-five million, six hundred sixty-four thousand, eight hundred forty-three".