210421089 has 12 divisors (see below), whose sum is σ = 317156736. Its totient is φ = 134181432.

The previous prime is 210421073. The next prime is 210421151. The reversal of 210421089 is 980124012.

It is not a de Polignac number, because 210421089 - 2⁴ = 210421073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210421039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508057 + ... + 508470.

It is an arithmetic number, because the mean of its divisors is an integer number (26429728).

Almost surely, 2^210421089 is an apocalyptic number.

It is an amenable number.

210421089 is a deficient number, since it is larger than the sum of its proper divisors (106735647).

210421089 is a wasteful number, since it uses less digits than its factorization.

210421089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016556 (or 1016553 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 210421089 is about 14505.8984209872. The cubic root of 210421089 is about 594.7892189386.

The spelling of 210421089 in words is "two hundred ten million, four hundred twenty-one thousand, eighty-nine".