1225624481 has 2 divisors, whose sum is σ = 1225624482. Its totient is φ = 1225624480.

The previous prime is 1225624459. The next prime is 1225624489. The reversal of 1225624481 is 1844265221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1224370081 + 1254400 = 34991^2 + 1120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225624481 is a prime.

It is a super-2 number, since 2×1225624481² = 3004310736853038722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1225624489) 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 as a sum of consecutive naturals, namely, 612812240 + 612812241.

It is an arithmetic number, because the mean of its divisors is an integer number (612812241).

Almost surely, 2^1225624481 is an apocalyptic number.

It is an amenable number.

1225624481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225624481 is an equidigital number, since it uses as much as digits as its factorization.

1225624481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 35.

The square root of 1225624481 is about 35008.9200204748. The cubic root of 1225624481 is about 1070.1692692293.

The spelling of 1225624481 in words is "one billion, two hundred twenty-five million, six hundred twenty-four thousand, four hundred eighty-one".