1623545 has 16 divisors (see below), whose sum is σ = 2429568. Its totient is φ = 1011840.

The previous prime is 1623539. The next prime is 1623553. The reversal of 1623545 is 5453261.

It is not a de Polignac number, because 1623545 - 2⁸ = 1623289 is a prime.

It is a Duffinian 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, 1724 + ... + 2493.

It is an arithmetic number, because the mean of its divisors is an integer number (151848).

2^1623545 is an apocalyptic number.

It is an amenable number.

1623545 is a deficient number, since it is larger than the sum of its proper divisors (806023).

1623545 is a wasteful number, since it uses less digits than its factorization.

1623545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240.

The product of its digits is 3600, while the sum is 26.

The square root of 1623545 is about 1274.1840526392. The cubic root of 1623545 is about 117.5316347596.

The spelling of 1623545 in words is "one million, six hundred twenty-three thousand, five hundred forty-five".