1225306317 has 4 divisors (see below), whose sum is σ = 1633741760. Its totient is φ = 816870876.

The previous prime is 1225306307. The next prime is 1225306321. The reversal of 1225306317 is 7136035221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1225306317 - 2⁷ = 1225306189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225306307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204217717 + ... + 204217722.

It is an arithmetic number, because the mean of its divisors is an integer number (408435440).

Almost surely, 2^1225306317 is an apocalyptic number.

It is an amenable number.

1225306317 is a deficient number, since it is larger than the sum of its proper divisors (408435443).

1225306317 is an equidigital number, since it uses as much as digits as its factorization.

1225306317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408435442.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 1225306317 is about 35004.3756836199. The cubic root of 1225306317 is about 1070.0766582630.

The spelling of 1225306317 in words is "one billion, two hundred twenty-five million, three hundred six thousand, three hundred seventeen".