1225798401 has 4 divisors (see below), whose sum is σ = 1634397872. Its totient is φ = 817198932.

The previous prime is 1225798397. The next prime is 1225798417. The reversal of 1225798401 is 1048975221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1225798401 - 2² = 1225798397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225798401.

It is not an unprimeable number, because it can be changed into a prime (1225798451) 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, 204299731 + ... + 204299736.

It is an arithmetic number, because the mean of its divisors is an integer number (408599468).

Almost surely, 2^1225798401 is an apocalyptic number.

It is an amenable number.

1225798401 is a deficient number, since it is larger than the sum of its proper divisors (408599471).

1225798401 is an equidigital number, since it uses as much as digits as its factorization.

1225798401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408599470.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 1225798401 is about 35011.4038707390. The cubic root of 1225798401 is about 1070.2198869727.

The spelling of 1225798401 in words is "one billion, two hundred twenty-five million, seven hundred ninety-eight thousand, four hundred one".