210149 has 4 divisors (see below), whose sum is σ = 216960. Its totient is φ = 203340.
The previous prime is 210143. The next prime is 210157. The reversal of 210149 is 941012.
It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-210149 is a prime.
It is an alternating number because its digits alternate between even and odd.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (210143) 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, 3359 + ... + 3420.
It is an arithmetic number, because the mean of its divisors is an integer number (54240).
2210149 is an apocalyptic number.
It is an amenable number.
210149 is a deficient number, since it is larger than the sum of its proper divisors (6811).
210149 is an equidigital number, since it uses as much as digits as its factorization.
210149 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6810.
The product of its (nonzero) digits is 72, while the sum is 17.
The square root of 210149 is about 458.4201129968. The cubic root of 210149 is about 59.4532740513.
The spelling of 210149 in words is "two hundred ten thousand, one hundred forty-nine".
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