1305172 has 12 divisors (see below), whose sum is σ = 2491776. Its totient is φ = 593240.

The previous prime is 1305169. The next prime is 1305229. The reversal of 1305172 is 2715031.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14788 + ... + 14875.

It is an arithmetic number, because the mean of its divisors is an integer number (207648).

2^1305172 is an apocalyptic number.

It is an amenable number.

1305172 is a deficient number, since it is larger than the sum of its proper divisors (1186604).

1305172 is a wasteful number, since it uses less digits than its factorization.

1305172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29678 (or 29676 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1305172 is about 1142.4412457540. The cubic root of 1305172 is about 109.2838322747.

The spelling of 1305172 in words is "one million, three hundred five thousand, one hundred seventy-two".