1227748645 has 8 divisors (see below), whose sum is σ = 1520824320. Its totient is φ = 950514960.

The previous prime is 1227748607. The next prime is 1227748651. The reversal of 1227748645 is 5468477221.

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

It is not a de Polignac number, because 1227748645 - 2¹³ = 1227740453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1227748595 and 1227748604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3960325 + ... + 3960634.

It is an arithmetic number, because the mean of its divisors is an integer number (190103040).

Almost surely, 2^1227748645 is an apocalyptic number.

It is an amenable number.

1227748645 is a deficient number, since it is larger than the sum of its proper divisors (293075675).

1227748645 is an equidigital number, since it uses as much as digits as its factorization.

1227748645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7920995.

The product of its digits is 752640, while the sum is 46.

The square root of 1227748645 is about 35039.2443554367. The cubic root of 1227748645 is about 1070.7871591503.

The spelling of 1227748645 in words is "one billion, two hundred twenty-seven million, seven hundred forty-eight thousand, six hundred forty-five".