1225077809 has 8 divisors (see below), whose sum is σ = 1274254080. Its totient is φ = 1176505200.

The previous prime is 1225077803. The next prime is 1225077853. The reversal of 1225077809 is 9087705221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1225077809 - 2¹⁶ = 1225012273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1225077803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146774 + ... + 154895.

It is an arithmetic number, because the mean of its divisors is an integer number (159281760).

Almost surely, 2^1225077809 is an apocalyptic number.

It is an amenable number.

1225077809 is a deficient number, since it is larger than the sum of its proper divisors (49176271).

1225077809 is a wasteful number, since it uses less digits than its factorization.

1225077809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301831.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 1225077809 is about 35001.1115394926. Note that the first 3 decimals coincide. The cubic root of 1225077809 is about 1070.0101344136.

The spelling of 1225077809 in words is "one billion, two hundred twenty-five million, seventy-seven thousand, eight hundred nine".