16491345 has 32 divisors (see below), whose sum is σ = 29659392. Its totient is φ = 7763712.

The previous prime is 16491341. The next prime is 16491361. The reversal of 16491345 is 54319461.

It is not a de Polignac number, because 16491345 - 2² = 16491341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16491341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2647 + ... + 6323.

It is an arithmetic number, because the mean of its divisors is an integer number (926856).

Almost surely, 2^16491345 is an apocalyptic number.

16491345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16491345 is a deficient number, since it is larger than the sum of its proper divisors (13168047).

16491345 is a wasteful number, since it uses less digits than its factorization.

16491345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721.

The product of its digits is 12960, while the sum is 33.

The square root of 16491345 is about 4060.9537057199. The cubic root of 16491345 is about 254.5376473912.

It can be divided in two parts, 16491 and 345, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 16491345 in words is "sixteen million, four hundred ninety-one thousand, three hundred forty-five".