1617232145 has 8 divisors (see below), whose sum is σ = 1967263656. Its totient is φ = 1276062336.

The previous prime is 1617232093. The next prime is 1617232153. The reversal of 1617232145 is 5412327161.

It can be written as a sum of positive squares in 4 ways, for example, as 436141456 + 1181090689 = 20884^2 + 34367^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1617232145 - 2⁶ = 1617232081 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2215022 + ... + 2215751.

It is an arithmetic number, because the mean of its divisors is an integer number (245907957).

Almost surely, 2^1617232145 is an apocalyptic number.

It is an amenable number.

1617232145 is a deficient number, since it is larger than the sum of its proper divisors (350031511).

1617232145 is an equidigital number, since it uses as much as digits as its factorization.

1617232145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430851.

The product of its digits is 10080, while the sum is 32.

The square root of 1617232145 is about 40214.8249405614. The cubic root of 1617232145 is about 1173.7910353748.

The spelling of 1617232145 in words is "one billion, six hundred seventeen million, two hundred thirty-two thousand, one hundred forty-five".