1225409249 has 8 divisors (see below), whose sum is σ = 1353905280. Its totient is φ = 1103181376.

The previous prime is 1225409233. The next prime is 1225409267. The reversal of 1225409249 is 9429045221.

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 1225409249 - 2⁴ = 1225409233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225409209) 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, 1566629 + ... + 1567410.

It is an arithmetic number, because the mean of its divisors is an integer number (169238160).

Almost surely, 2^1225409249 is an apocalyptic number.

It is an amenable number.

1225409249 is a deficient number, since it is larger than the sum of its proper divisors (128496031).

1225409249 is a wasteful number, since it uses less digits than its factorization.

1225409249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3134079.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1225409249 is about 35005.8459260735. The cubic root of 1225409249 is about 1070.1066213955.

The spelling of 1225409249 in words is "one billion, two hundred twenty-five million, four hundred nine thousand, two hundred forty-nine".