1228512613 has 8 divisors (see below), whose sum is σ = 1232884800. Its totient is φ = 1224149088.

The previous prime is 1228512589. The next prime is 1228512641. The reversal of 1228512613 is 3162158221.

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

It is not a de Polignac number, because 1228512613 - 2²⁹ = 691641701 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 (1228512673) 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, 405418 + ... + 408436.

It is an arithmetic number, because the mean of its divisors is an integer number (154110600).

Almost surely, 2^1228512613 is an apocalyptic number.

It is an amenable number.

1228512613 is a deficient number, since it is larger than the sum of its proper divisors (4372187).

1228512613 is an equidigital number, since it uses as much as digits as its factorization.

1228512613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331.

The product of its digits is 5760, while the sum is 31.

The square root of 1228512613 is about 35050.1442650383. The cubic root of 1228512613 is about 1071.0092126109.

The spelling of 1228512613 in words is "one billion, two hundred twenty-eight million, five hundred twelve thousand, six hundred thirteen".