1228145583 has 8 divisors (see below), whose sum is σ = 1871459968. Its totient is φ = 701797464.

The previous prime is 1228145573. The next prime is 1228145587. The reversal of 1228145583 is 3855418221.

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

It is not a de Polignac number, because 1228145583 - 2¹⁰ = 1228144559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228145587) 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, 29241541 + ... + 29241582.

It is an arithmetic number, because the mean of its divisors is an integer number (233932496).

Almost surely, 2^1228145583 is an apocalyptic number.

1228145583 is a deficient number, since it is larger than the sum of its proper divisors (643314385).

1228145583 is an equidigital number, since it uses as much as digits as its factorization.

1228145583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58483133.

The product of its digits is 76800, while the sum is 39.

The square root of 1228145583 is about 35044.9080894786. The cubic root of 1228145583 is about 1070.9025438744.

The spelling of 1228145583 in words is "one billion, two hundred twenty-eight million, one hundred forty-five thousand, five hundred eighty-three".