16249505 has 4 divisors (see below), whose sum is σ = 19499412. Its totient is φ = 12999600.

The previous prime is 16249481. The next prime is 16249543. The reversal of 16249505 is 50594261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50594261 = 17 ⋅2976133.

It can be written as a sum of positive squares in 2 ways, for example, as 1817104 + 14432401 = 1348^2 + 3799^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16249505 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 3 ways as a sum of consecutive naturals, for example, 1624946 + ... + 1624955.

It is an arithmetic number, because the mean of its divisors is an integer number (4874853).

Almost surely, 2^16249505 is an apocalyptic number.

It is an amenable number.

16249505 is a deficient number, since it is larger than the sum of its proper divisors (3249907).

16249505 is an equidigital number, since it uses as much as digits as its factorization.

16249505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3249906.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 16249505 is about 4031.0674764881. The cubic root of 16249505 is about 253.2872790628.

The spelling of 16249505 in words is "sixteen million, two hundred forty-nine thousand, five hundred five".