1225128759 has 8 divisors (see below), whose sum is σ = 1719479040. Its totient is φ = 773765496.

The previous prime is 1225128757. The next prime is 1225128767. The reversal of 1225128759 is 9578215221.

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

It is not a de Polignac number, because 1225128759 - 2¹ = 1225128757 is a prime.

It is a super-2 number, since 2×1225128759² = 3001880952257760162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1225128759.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225128757) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10746687 + ... + 10746800.

It is an arithmetic number, because the mean of its divisors is an integer number (214934880).

Almost surely, 2^1225128759 is an apocalyptic number.

1225128759 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1225128759 is a deficient number, since it is larger than the sum of its proper divisors (494350281).

1225128759 is a wasteful number, since it uses less digits than its factorization.

1225128759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21493509.

The product of its digits is 100800, while the sum is 42.

The square root of 1225128759 is about 35001.8393659533. The cubic root of 1225128759 is about 1070.0249678280.

The spelling of 1225128759 in words is "one billion, two hundred twenty-five million, one hundred twenty-eight thousand, seven hundred fifty-nine".