1345225205 has 4 divisors (see below), whose sum is σ = 1614270252. Its totient is φ = 1076180160.

The previous prime is 1345225183. The next prime is 1345225229. The reversal of 1345225205 is 5025225431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5025225431 = 19 ⋅264485549.

It can be written as a sum of positive squares in 2 ways, for example, as 1045034929 + 300190276 = 32327^2 + 17326^2 .

It is not a de Polignac number, because 1345225205 - 2⁸ = 1345224949 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 134522516 + ... + 134522525.

It is an arithmetic number, because the mean of its divisors is an integer number (403567563).

Almost surely, 2^1345225205 is an apocalyptic number.

It is an amenable number.

1345225205 is a deficient number, since it is larger than the sum of its proper divisors (269045047).

1345225205 is an equidigital number, since it uses as much as digits as its factorization.

1345225205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269045046.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 1345225205 is about 36677.3118562416. The cubic root of 1345225205 is about 1103.9049107368.

The spelling of 1345225205 in words is "one billion, three hundred forty-five million, two hundred twenty-five thousand, two hundred five".