1226727545 has 4 divisors (see below), whose sum is σ = 1472073060. Its totient is φ = 981382032.

The previous prime is 1226727539. The next prime is 1226727569. The reversal of 1226727545 is 5457276221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5457276221 = 137 ⋅39834133.

It can be written as a sum of positive squares in 2 ways, for example, as 387814249 + 838913296 = 19693^2 + 28964^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226727545 - 2¹⁰ = 1226726521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122672750 + ... + 122672759.

It is an arithmetic number, because the mean of its divisors is an integer number (368018265).

Almost surely, 2^1226727545 is an apocalyptic number.

It is an amenable number.

1226727545 is a deficient number, since it is larger than the sum of its proper divisors (245345515).

1226727545 is an equidigital number, since it uses as much as digits as its factorization.

1226727545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245345514.

The product of its digits is 235200, while the sum is 41.

The square root of 1226727545 is about 35024.6705195067. The cubic root of 1226727545 is about 1070.4902243152.

The spelling of 1226727545 in words is "one billion, two hundred twenty-six million, seven hundred twenty-seven thousand, five hundred forty-five".