1625723 has 4 divisors (see below), whose sum is σ = 1773528. Its totient is φ = 1477920.

The previous prime is 1625719. The next prime is 1625747. The reversal of 1625723 is 3275261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1625723 - 2² = 1625719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1625692 and 1625701.

It is not an unprimeable number, because it can be changed into a prime (1625123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73886 + ... + 73907.

It is an arithmetic number, because the mean of its divisors is an integer number (443382).

2^1625723 is an apocalyptic number.

1625723 is a deficient number, since it is larger than the sum of its proper divisors (147805).

1625723 is a wasteful number, since it uses less digits than its factorization.

1625723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147804.

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

The square root of 1625723 is about 1275.0384307934. The cubic root of 1625723 is about 117.5841678518.

It can be divided in two parts, 162 and 5723, that added together give a palindrome (5885).

The spelling of 1625723 in words is "one million, six hundred twenty-five thousand, seven hundred twenty-three".