1219852845 has 16 divisors (see below), whose sum is σ = 2168627520. Its totient is φ = 650588112.

The previous prime is 1219852841. The next prime is 1219852847. The reversal of 1219852845 is 5482589121.

It is not a de Polignac number, because 1219852845 - 2² = 1219852841 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1219852845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219852841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4517839 + ... + 4518108.

It is an arithmetic number, because the mean of its divisors is an integer number (135539220).

Almost surely, 2^1219852845 is an apocalyptic number.

1219852845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1219852845 is a deficient number, since it is larger than the sum of its proper divisors (948774675).

1219852845 is an equidigital number, since it uses as much as digits as its factorization.

1219852845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9035961 (or 9035955 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 1219852845 is about 34926.3918119235. The cubic root of 1219852845 is about 1068.4867668115.

The spelling of 1219852845 in words is "one billion, two hundred nineteen million, eight hundred fifty-two thousand, eight hundred forty-five".