1623245 has 24 divisors (see below), whose sum is σ = 2253096. Its totient is φ = 1118208.

The previous prime is 1623233. The next prime is 1623263. The reversal of 1623245 is 5423261.

1623245 = 1² + 2² + ... + 169².

It can be written as a sum of positive squares in 12 ways, for example, as 1196836 + 426409 = 1094^2 + 653^2 .

It is not a de Polignac number, because 1623245 - 2⁴ = 1623229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1623245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14309 + ... + 14421.

It is an arithmetic number, because the mean of its divisors is an integer number (93879).

2^1623245 is an apocalyptic number.

It is an amenable number.

1623245 is a deficient number, since it is larger than the sum of its proper divisors (629851).

1623245 is a wasteful number, since it uses less digits than its factorization.

1623245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 148 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 1623245 is about 1274.0663248042. The cubic root of 1623245 is about 117.5243951159.

The spelling of 1623245 in words is "one million, six hundred twenty-three thousand, two hundred forty-five".