1623625 has 16 divisors (see below), whose sum is σ = 2096640. Its totient is φ = 1254000.

The previous prime is 1623599. The next prime is 1623631. The reversal of 1623625 is 5263261.

It is not a de Polignac number, because 1623625 - 2¹³ = 1615433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an Ulam number.

It is a nialpdrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 1623625.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3666 + ... + 4084.

It is an arithmetic number, because the mean of its divisors is an integer number (131040).

2^1623625 is an apocalyptic number.

It is an amenable number.

1623625 is a deficient number, since it is larger than the sum of its proper divisors (473015).

1623625 is an equidigital number, since it uses as much as digits as its factorization.

1623625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 455 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 1623625 is about 1274.2154448915. The cubic root of 1623625 is about 117.5335651807.

Adding to 1623625 its reverse (5263261), we get a palindrome (6886886).

It can be divided in two parts, 16236 and 25, that added together give a palindrome (16261).

The spelling of 1623625 in words is "one million, six hundred twenty-three thousand, six hundred twenty-five".