210405045 has 32 divisors (see below), whose sum is σ = 342673920. Its totient is φ = 110223360.

The previous prime is 210405037. The next prime is 210405049. The reversal of 210405045 is 540504012.

It is not a de Polignac number, because 210405045 - 2³ = 210405037 is a prime.

It is a super-2 number, since 2×210405045² = 88540565922904050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210405049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327925 + ... + 328565.

It is an arithmetic number, because the mean of its divisors is an integer number (10708560).

Almost surely, 2^210405045 is an apocalyptic number.

It is an amenable number.

210405045 is a deficient number, since it is larger than the sum of its proper divisors (132268875).

210405045 is a wasteful number, since it uses less digits than its factorization.

210405045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 210405045 is about 14505.3453940263. The cubic root of 210405045 is about 594.7741015680.

Adding to 210405045 its reverse (540504012), we get a palindrome (750909057).

The spelling of 210405045 in words is "two hundred ten million, four hundred five thousand, forty-five".