1385172 has 36 divisors (see below), whose sum is σ = 3543540. Its totient is φ = 456192.

The previous prime is 1385171. The next prime is 1385179. The reversal of 1385172 is 2715831.

It can be written as a sum of positive squares in 2 ways, for example, as 767376 + 617796 = 876^2 + 786^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3748 + ... + 4100.

2^1385172 is an apocalyptic number.

1385172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1385172 is an abundant number, since it is smaller than the sum of its proper divisors (2158368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1385172 is a wasteful number, since it uses less digits than its factorization.

1385172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 467 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 1385172 is about 1176.9333031230. The cubic root of 1385172 is about 111.4725411145.

The spelling of 1385172 in words is "one million, three hundred eighty-five thousand, one hundred seventy-two".