1345102181 has 4 divisors (see below), whose sum is σ = 1381456332. Its totient is φ = 1308748032.

The previous prime is 1345102151. The next prime is 1345102219. The reversal of 1345102181 is 1812015431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 872257156 + 472845025 = 29534^2 + 21745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1345102181 - 2¹⁸ = 1344840037 is a prime.

It is a super-4 number, since 4×1345102181⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1345102181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345102151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18177020 + ... + 18177093.

It is an arithmetic number, because the mean of its divisors is an integer number (345364083).

Almost surely, 2^1345102181 is an apocalyptic number.

It is an amenable number.

1345102181 is a deficient number, since it is larger than the sum of its proper divisors (36354151).

1345102181 is an equidigital number, since it uses as much as digits as its factorization.

1345102181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36354150.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 1345102181 is about 36675.6347048010. The cubic root of 1345102181 is about 1103.8712581466.

The spelling of 1345102181 in words is "one billion, three hundred forty-five million, one hundred two thousand, one hundred eighty-one".