16242745 has 4 divisors (see below), whose sum is σ = 19491300. Its totient is φ = 12994192.

The previous prime is 16242703. The next prime is 16242757. The reversal of 16242745 is 54724261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54724261 = 1187 ⋅46103.

It can be written as a sum of positive squares in 2 ways, for example, as 8357881 + 7884864 = 2891^2 + 2808^2 .

It is a cyclic number.

It is not a de Polignac number, because 16242745 - 2¹⁷ = 16111673 is a prime.

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, 1624270 + ... + 1624279.

It is an arithmetic number, because the mean of its divisors is an integer number (4872825).

Almost surely, 2^16242745 is an apocalyptic number.

It is an amenable number.

16242745 is a deficient number, since it is larger than the sum of its proper divisors (3248555).

16242745 is an equidigital number, since it uses as much as digits as its factorization.

16242745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248554.

The product of its digits is 13440, while the sum is 31.

The square root of 16242745 is about 4030.2289016878. The cubic root of 16242745 is about 253.2521506184.

The spelling of 16242745 in words is "sixteen million, two hundred forty-two thousand, seven hundred forty-five".