16403245 has 4 divisors (see below), whose sum is σ = 19683900. Its totient is φ = 13122592.

The previous prime is 16403243. The next prime is 16403269. The reversal of 16403245 is 54230461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54230461 = 751 ⋅72211.

It can be written as a sum of positive squares in 2 ways, for example, as 9449476 + 6953769 = 3074^2 + 2637^2 .

It is a cyclic number.

It is not a de Polignac number, because 16403245 - 2¹ = 16403243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16403243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640320 + ... + 1640329.

It is an arithmetic number, because the mean of its divisors is an integer number (4920975).

Almost surely, 2^16403245 is an apocalyptic number.

It is an amenable number.

16403245 is a deficient number, since it is larger than the sum of its proper divisors (3280655).

16403245 is an equidigital number, since it uses as much as digits as its factorization.

16403245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280654.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 16403245 is about 4050.0919742643. The cubic root of 16403245 is about 254.0835744987.

The spelling of 16403245 in words is "sixteen million, four hundred three thousand, two hundred forty-five".