1628425 has 12 divisors (see below), whose sum is σ = 2059020. Its totient is φ = 1277120.

The previous prime is 1628401. The next prime is 1628441. The reversal of 1628425 is 5248261.

It can be written as a sum of positive squares in 6 ways, for example, as 149769 + 1478656 = 387^2 + 1216^2 .

It is not a de Polignac number, because 1628425 - 2¹¹ = 1626377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1628393 and 1628402.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 711 + ... + 1939.

It is an arithmetic number, because the mean of its divisors is an integer number (171585).

2^1628425 is an apocalyptic number.

It is an amenable number.

1628425 is a deficient number, since it is larger than the sum of its proper divisors (430595).

1628425 is a wasteful number, since it uses less digits than its factorization.

1628425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292 (or 1287 counting only the distinct ones).

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

The square root of 1628425 is about 1276.0975668028. The cubic root of 1628425 is about 117.6492745906.

It can be divided in two parts, 16 and 28425, that added together give a triangular number (28441 = T₂₃₈).

The spelling of 1628425 in words is "one million, six hundred twenty-eight thousand, four hundred twenty-five".