1225825078 has 4 divisors (see below), whose sum is σ = 1838737620. Its totient is φ = 612912538.

The previous prime is 1225825021. The next prime is 1225825079. The reversal of 1225825078 is 8705285221.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1225825078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225825079) 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, 306456268 + ... + 306456271.

It is an arithmetic number, because the mean of its divisors is an integer number (459684405).

Almost surely, 2^1225825078 is an apocalyptic number.

1225825078 is a deficient number, since it is larger than the sum of its proper divisors (612912542).

1225825078 is an equidigital number, since it uses as much as digits as its factorization.

1225825078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612912541.

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 1225825078 is about 35011.7848445348. The cubic root of 1225825078 is about 1070.2276506334.

The spelling of 1225825078 in words is "one billion, two hundred twenty-five million, eight hundred twenty-five thousand, seventy-eight".