1225505361 has 8 divisors (see below), whose sum is σ = 1686717184. Its totient is φ = 790648560.

The previous prime is 1225505357. The next prime is 1225505363. The reversal of 1225505361 is 1635055221.

It is a happy number.

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

It is not a de Polignac number, because 1225505361 - 2² = 1225505357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225505363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6588646 + ... + 6588831.

It is an arithmetic number, because the mean of its divisors is an integer number (210839648).

Almost surely, 2^1225505361 is an apocalyptic number.

It is an amenable number.

1225505361 is a deficient number, since it is larger than the sum of its proper divisors (461211823).

1225505361 is a wasteful number, since it uses less digits than its factorization.

1225505361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13177511.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 1225505361 is about 35007.2186984342. The cubic root of 1225505361 is about 1070.1345977359.

The spelling of 1225505361 in words is "one billion, two hundred twenty-five million, five hundred five thousand, three hundred sixty-one".