1226645625 has 80 divisors (see below), whose sum is σ = 2240282880. Its totient is φ = 594048000.

The previous prime is 1226645597. The next prime is 1226645633. The reversal of 1226645625 is 5265466221.

It is not a de Polignac number, because 1226645625 - 2⁵ = 1226645593 is a prime.

It is an unprimeable number.

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 in 79 ways as a sum of consecutive naturals, for example, 923712 + ... + 925038.

It is an arithmetic number, because the mean of its divisors is an integer number (28003536).

Almost surely, 2^1226645625 is an apocalyptic number.

1226645625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1226645625 is a deficient number, since it is larger than the sum of its proper divisors (1013637255).

1226645625 is a wasteful number, since it uses less digits than its factorization.

1226645625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396 (or 1381 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 1226645625 is about 35023.5010385884. The cubic root of 1226645625 is about 1070.4663949241.

The spelling of 1226645625 in words is "one billion, two hundred twenty-six million, six hundred forty-five thousand, six hundred twenty-five".