1225204455 has 16 divisors (see below), whose sum is σ = 2063502720. Its totient is φ = 619050528.

The previous prime is 1225204439. The next prime is 1225204469. The reversal of 1225204455 is 5544025221.

It is not a de Polignac number, because 1225204455 - 2⁴ = 1225204439 is a prime.

It is a super-2 number, since 2×1225204455² = 3002251913103694050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2149197 + ... + 2149766.

It is an arithmetic number, because the mean of its divisors is an integer number (128968920).

Almost surely, 2^1225204455 is an apocalyptic number.

1225204455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1225204455 is a deficient number, since it is larger than the sum of its proper divisors (838298265).

1225204455 is a wasteful number, since it uses less digits than its factorization.

1225204455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4298990.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 1225204455 is about 35002.9206638532. The cubic root of 1225204455 is about 1070.0470049517.

Adding to 1225204455 its reverse (5544025221), we get a palindrome (6769229676).

The spelling of 1225204455 in words is "one billion, two hundred twenty-five million, two hundred four thousand, four hundred fifty-five".