1642825 has 6 divisors (see below), whose sum is σ = 2037134. Its totient is φ = 1314240.

The previous prime is 1642813. The next prime is 1642831. The reversal of 1642825 is 5282461.

It can be written as a sum of positive squares in 3 ways, for example, as 322624 + 1320201 = 568^2 + 1149^2 .

It is not a de Polignac number, because 1642825 - 2⁹ = 1642313 is a prime.

It is a Duffinian number.

1642825 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1642793 and 1642802.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32832 + ... + 32881.

2^1642825 is an apocalyptic number.

It is an amenable number.

1642825 is a deficient number, since it is larger than the sum of its proper divisors (394309).

1642825 is an equidigital number, since it uses as much as digits as its factorization.

1642825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65723 (or 65718 counting only the distinct ones).

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

The square root of 1642825 is about 1281.7273501022. The cubic root of 1642825 is about 117.9950443193.

The spelling of 1642825 in words is "one million, six hundred forty-two thousand, eight hundred twenty-five".