1345242173 has 4 divisors (see below), whose sum is σ = 1467536928. Its totient is φ = 1222947420.

The previous prime is 1345242167. The next prime is 1345242191. The reversal of 1345242173 is 3712425431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1345242173 - 2¹² = 1345238077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345242163) 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, 61147361 + ... + 61147382.

It is an arithmetic number, because the mean of its divisors is an integer number (366884232).

Almost surely, 2^1345242173 is an apocalyptic number.

It is an amenable number.

1345242173 is a deficient number, since it is larger than the sum of its proper divisors (122294755).

1345242173 is a wasteful number, since it uses less digits than its factorization.

1345242173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122294754.

The product of its digits is 20160, while the sum is 32.

The square root of 1345242173 is about 36677.5431701743. The cubic root of 1345242173 is about 1103.9095520860.

The spelling of 1345242173 in words is "one billion, three hundred forty-five million, two hundred forty-two thousand, one hundred seventy-three".