1617955 has 4 divisors (see below), whose sum is σ = 1941552. Its totient is φ = 1294360.

The previous prime is 1617949. The next prime is 1617971. The reversal of 1617955 is 5597161.

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

It is not a de Polignac number, because 1617955 - 2⁵ = 1617923 is a prime.

It is a Duffinian number.

1617955 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1617955.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161791 + ... + 161800.

It is an arithmetic number, because the mean of its divisors is an integer number (485388).

2^1617955 is an apocalyptic number.

1617955 is a deficient number, since it is larger than the sum of its proper divisors (323597).

1617955 is an equidigital number, since it uses as much as digits as its factorization.

1617955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323596.

The product of its digits is 9450, while the sum is 34.

The square root of 1617955 is about 1271.9886005779. The cubic root of 1617955 is about 117.3965892633.

It can be divided in two parts, 16 and 17955, that added together give a palindrome (17971).

The spelling of 1617955 in words is "one million, six hundred seventeen thousand, nine hundred fifty-five".