1225440001 has 2 divisors, whose sum is σ = 1225440002. Its totient is φ = 1225440000.

The previous prime is 1225439987. The next prime is 1225440059. The reversal of 1225440001 is 1000445221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 706283776 + 519156225 = 26576^2 + 22785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225440001 - 2⁹ = 1225439489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225447001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612720000 + 612720001.

It is an arithmetic number, because the mean of its divisors is an integer number (612720001).

Almost surely, 2^1225440001 is an apocalyptic number.

It is an amenable number.

1225440001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225440001 is an equidigital number, since it uses as much as digits as its factorization.

1225440001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1225440001 is about 35006.2851642387. The cubic root of 1225440001 is about 1070.1155728658.

Adding to 1225440001 its reverse (1000445221), we get a palindrome (2225885222).

The spelling of 1225440001 in words is "one billion, two hundred twenty-five million, four hundred forty thousand, one".