210421034 has 4 divisors (see below), whose sum is σ = 315631554. Its totient is φ = 105210516.

The previous prime is 210421027. The next prime is 210421039. The reversal of 210421034 is 430124012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 156325009 + 54096025 = 12503^2 + 7355^2 .

It is a Curzon number.

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 as a sum of consecutive naturals, namely, 52605257 + ... + 52605260.

Almost surely, 2^210421034 is an apocalyptic number.

210421034 is a deficient number, since it is larger than the sum of its proper divisors (105210520).

210421034 is a wasteful number, since it uses less digits than its factorization.

210421034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105210519.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 210421034 is about 14505.8965252066. The cubic root of 210421034 is about 594.7891671165.

Adding to 210421034 its reverse (430124012), we get a palindrome (640545046).

The spelling of 210421034 in words is "two hundred ten million, four hundred twenty-one thousand, thirty-four".