421562461 has 4 divisors (see below), whose sum is σ = 422372124. Its totient is φ = 420752800.

The previous prime is 421562441. The next prime is 421562483. The reversal of 421562461 is 164265124.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 50268100 + 371294361 = 7090^2 + 19269^2 .

It is a cyclic number.

It is not a de Polignac number, because 421562461 - 2¹³ = 421554269 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421562431) 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 3 ways as a sum of consecutive naturals, for example, 404050 + ... + 405091.

It is an arithmetic number, because the mean of its divisors is an integer number (105593031).

Almost surely, 2^421562461 is an apocalyptic number.

It is an amenable number.

421562461 is a deficient number, since it is larger than the sum of its proper divisors (809663).

421562461 is an equidigital number, since it uses as much as digits as its factorization.

421562461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809662.

The product of its digits is 11520, while the sum is 31.

The square root of 421562461 is about 20531.9862896896. The cubic root of 421562461 is about 749.8147459487.

The spelling of 421562461 in words is "four hundred twenty-one million, five hundred sixty-two thousand, four hundred sixty-one".