210840145 has 8 divisors (see below), whose sum is σ = 261169920. Its totient is φ = 163230960.

The previous prime is 210840139. The next prime is 210840151. The reversal of 210840145 is 541048012.

It is an interprime number because it is at equal distance from previous prime (210840139) and next prime (210840151).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210840145 - 2¹³ = 210831953 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679975 + ... + 680284.

It is an arithmetic number, because the mean of its divisors is an integer number (32646240).

Almost surely, 2^210840145 is an apocalyptic number.

It is an amenable number.

210840145 is a deficient number, since it is larger than the sum of its proper divisors (50329775).

210840145 is a wasteful number, since it uses less digits than its factorization.

210840145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360295.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 210840145 is about 14520.3355677477. The cubic root of 210840145 is about 595.1838002890.

Adding to 210840145 its reverse (541048012), we get a palindrome (751888157).

The spelling of 210840145 in words is "two hundred ten million, eight hundred forty thousand, one hundred forty-five".