1628245 has 8 divisors (see below), whose sum is σ = 1968984. Its totient is φ = 1292544.

The previous prime is 1628227. The next prime is 1628261. The reversal of 1628245 is 5428261.

It can be written as a sum of positive squares in 4 ways, for example, as 154449 + 1473796 = 393^2 + 1214^2 .

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 1628245 - 2⁷ = 1628117 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a nialpdrome in base 12.

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, 504 + ... + 1873.

It is an arithmetic number, because the mean of its divisors is an integer number (246123).

2^1628245 is an apocalyptic number.

It is an amenable number.

1628245 is a deficient number, since it is larger than the sum of its proper divisors (340739).

1628245 is a wasteful number, since it uses less digits than its factorization.

1628245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519.

The product of its digits is 3840, while the sum is 28.

The square root of 1628245 is about 1276.0270373311. The cubic root of 1628245 is about 117.6449395942.

The spelling of 1628245 in words is "one million, six hundred twenty-eight thousand, two hundred forty-five".