1623725 has 12 divisors (see below), whose sum is σ = 2035584. Its totient is φ = 1284720.

The previous prime is 1623707. The next prime is 1623733. The reversal of 1623725 is 5273261.

It is not a de Polignac number, because 1623725 - 2¹⁶ = 1558189 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1623694 and 1623703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2372 + ... + 2978.

It is an arithmetic number, because the mean of its divisors is an integer number (169632).

2^1623725 is an apocalyptic number.

It is an amenable number.

1623725 is a deficient number, since it is larger than the sum of its proper divisors (411859).

1623725 is a wasteful number, since it uses less digits than its factorization.

1623725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 719 counting only the distinct ones).

The product of its digits is 2520, while the sum is 26.

The square root of 1623725 is about 1274.2546841193. The cubic root of 1623725 is about 117.5359781178.

Adding to 1623725 its reverse (5273261), we get a palindrome (6896986).

The spelling of 1623725 in words is "one million, six hundred twenty-three thousand, seven hundred twenty-five".