16245021 has 16 divisors (see below), whose sum is σ = 23678144. Its totient is φ = 9846144.

The previous prime is 16245011. The next prime is 16245037. The reversal of 16245021 is 12054261.

It is not a de Polignac number, because 16245021 - 2⁵ = 16244989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16245011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496 + ... + 5721.

It is an arithmetic number, because the mean of its divisors is an integer number (1479884).

Almost surely, 2^16245021 is an apocalyptic number.

It is an amenable number.

16245021 is a deficient number, since it is larger than the sum of its proper divisors (7433123).

16245021 is a wasteful number, since it uses less digits than its factorization.

16245021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6300.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 16245021 is about 4030.5112578927. The cubic root of 16245021 is about 253.2639789757.

Adding to 16245021 its reverse (12054261), we get a palindrome (28299282).

It can be divided in two parts, 1624502 and 1, that added together give a triangular number (1624503 = T₁₈₀₂).

The spelling of 16245021 in words is "sixteen million, two hundred forty-five thousand, twenty-one".