16212645 has 24 divisors (see below), whose sum is σ = 29756376. Its totient is φ = 8137728.

The previous prime is 16212629. The next prime is 16212649. The reversal of 16212645 is 54621261.

16212645 is a `hidden beast` number, since 1 + 6 + 2 + 12 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 459684 + 15752961 = 678^2 + 3969^2 .

It is not a de Polignac number, because 16212645 - 2⁴ = 16212629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16212649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9832 + ... + 11361.

It is an arithmetic number, because the mean of its divisors is an integer number (1239849).

Almost surely, 2^16212645 is an apocalyptic number.

16212645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16212645 is a deficient number, since it is larger than the sum of its proper divisors (13543731).

16212645 is a wasteful number, since it uses less digits than its factorization.

16212645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21221 (or 21218 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 16212645 is about 4026.4928908419. The cubic root of 16212645 is about 253.0956170740.

The spelling of 16212645 in words is "sixteen million, two hundred twelve thousand, six hundred forty-five".