1672645 has 8 divisors (see below), whose sum is σ = 2161656. Its totient is φ = 1235136.

The previous prime is 1672639. The next prime is 1672651. The reversal of 1672645 is 5462761.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1672639) and next prime (1672651).

It can be written as a sum of positive squares in 4 ways, for example, as 31684 + 1640961 = 178^2 + 1281^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1672645 - 2³ = 1672637 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 7 ways as a sum of consecutive naturals, for example, 12802 + ... + 12931.

It is an arithmetic number, because the mean of its divisors is an integer number (270207).

2^1672645 is an apocalyptic number.

It is an amenable number.

1672645 is a deficient number, since it is larger than the sum of its proper divisors (489011).

1672645 is a wasteful number, since it uses less digits than its factorization.

1672645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25751.

The product of its digits is 10080, while the sum is 31.

The square root of 1672645 is about 1293.3077746615. The cubic root of 1672645 is about 118.7047029453.

The spelling of 1672645 in words is "one million, six hundred seventy-two thousand, six hundred forty-five".