1226780625 has 80 divisors (see below), whose sum is σ = 2355246080. Its totient is φ = 556200000.

The previous prime is 1226780603. The next prime is 1226780641. The reversal of 1226780625 is 5260876221.

It is not a de Polignac number, because 1226780625 - 2⁵ = 1226780593 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1981566 + ... + 1982184.

It is an arithmetic number, because the mean of its divisors is an integer number (29440576).

Almost surely, 2^1226780625 is an apocalyptic number.

1226780625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1226780625 is a deficient number, since it is larger than the sum of its proper divisors (1128465455).

1226780625 is an equidigital number, since it uses as much as digits as its factorization.

1226780625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1226780625 is about 35025.4282629064. The cubic root of 1226780625 is about 1070.5056639841.

The spelling of 1226780625 in words is "one billion, two hundred twenty-six million, seven hundred eighty thousand, six hundred twenty-five".