210406426 has 12 divisors (see below), whose sum is σ = 326870622. Its totient is φ = 101574704.

The previous prime is 210406387. The next prime is 210406429. The reversal of 210406426 is 624604012.

It can be written as a sum of positive squares in 3 ways, for example, as 210105025 + 301401 = 14495^2 + 549^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 210406426.

It is not an unprimeable number, because it can be changed into a prime (210406429) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 60865 + ... + 64228.

Almost surely, 2^210406426 is an apocalyptic number.

210406426 is a deficient number, since it is larger than the sum of its proper divisors (116464196).

210406426 is a wasteful number, since it uses less digits than its factorization.

210406426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125153 (or 125124 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 210406426 is about 14505.3929970890. The cubic root of 210406426 is about 594.7754028378.

The spelling of 210406426 in words is "two hundred ten million, four hundred six thousand, four hundred twenty-six".