1225624611 has 4 divisors (see below), whose sum is σ = 1634166152. Its totient is φ = 817083072.

The previous prime is 1225624601. The next prime is 1225624619. The reversal of 1225624611 is 1164265221.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1225624611 is a prime.

It is a super-3 number, since 3×1225624611³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225624619) 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, 204270766 + ... + 204270771.

It is an arithmetic number, because the mean of its divisors is an integer number (408541538).

Almost surely, 2^1225624611 is an apocalyptic number.

1225624611 is a deficient number, since it is larger than the sum of its proper divisors (408541541).

1225624611 is an equidigital number, since it uses as much as digits as its factorization.

1225624611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408541540.

The product of its digits is 5760, while the sum is 30.

The square root of 1225624611 is about 35008.9218771444. The cubic root of 1225624611 is about 1070.1693070664.

Adding to 1225624611 its reverse (1164265221), we get a palindrome (2389889832).

The spelling of 1225624611 in words is "one billion, two hundred twenty-five million, six hundred twenty-four thousand, six hundred eleven".