1672245 has 20 divisors (see below), whose sum is σ = 2998380. Its totient is φ = 891648.

The previous prime is 1672243. The next prime is 1672271. The reversal of 1672245 is 5422761.

It can be written as a sum of positive squares in 2 ways, for example, as 762129 + 910116 = 873^2 + 954^2 .

It is not a de Polignac number, because 1672245 - 2¹ = 1672243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672243) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1660 + ... + 2469.

It is an arithmetic number, because the mean of its divisors is an integer number (149919).

2^1672245 is an apocalyptic number.

1672245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1672245 is a deficient number, since it is larger than the sum of its proper divisors (1326135).

1672245 is an equidigital number, since it uses as much as digits as its factorization.

1672245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4146 (or 4137 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 1672245 is about 1293.1531231838. The cubic root of 1672245 is about 118.6952397564.

The spelling of 1672245 in words is "one million, six hundred seventy-two thousand, two hundred forty-five".