1616345 has 8 divisors (see below), whose sum is σ = 1992264. Its totient is φ = 1257984.

The previous prime is 1616297. The next prime is 1616347. The reversal of 1616345 is 5436161.

It can be written as a sum of positive squares in 4 ways, for example, as 355216 + 1261129 = 596^2 + 1123^2 .

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 1616345 - 2⁶ = 1616281 is a prime.

It is a super-2 number, since 2×1616345² = 5225142318050, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4184 + ... + 4553.

It is an arithmetic number, because the mean of its divisors is an integer number (249033).

2^1616345 is an apocalyptic number.

It is an amenable number.

1616345 is a deficient number, since it is larger than the sum of its proper divisors (375919).

1616345 is an equidigital number, since it uses as much as digits as its factorization.

1616345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8779.

The product of its digits is 2160, while the sum is 26.

The square root of 1616345 is about 1271.3555757537. The cubic root of 1616345 is about 117.3576365449.

It can be divided in two parts, 16 and 16345, that added together give a palindrome (16361).

The spelling of 1616345 in words is "one million, six hundred sixteen thousand, three hundred forty-five".