1623745 has 16 divisors (see below), whose sum is σ = 2046528. Its totient is φ = 1235520.

The previous prime is 1623733. The next prime is 1623763. The reversal of 1623745 is 5473261.

It is not a de Polignac number, because 1623745 - 2⁹ = 1623233 is a prime.

It is an Ulam number.

It is a Duffinian number.

Its product of digits (5040) is a multiple of the sum of its prime divisors (240).

1623745 is a lucky number.

It is a congruent number.

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, 12330 + ... + 12460.

It is an arithmetic number, because the mean of its divisors is an integer number (127908).

2^1623745 is an apocalyptic number.

It is an amenable number.

1623745 is a deficient number, since it is larger than the sum of its proper divisors (422783).

1623745 is a wasteful number, since it uses less digits than its factorization.

1623745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240.

The product of its digits is 5040, while the sum is 28.

The square root of 1623745 is about 1274.2625318199. The cubic root of 1623745 is about 117.5364606934.

The spelling of 1623745 in words is "one million, six hundred twenty-three thousand, seven hundred forty-five".