421862501 has 4 divisors (see below), whose sum is σ = 422465004. Its totient is φ = 421260000.

The previous prime is 421862473. The next prime is 421862503. The reversal of 421862501 is 105268124.

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 305200900 + 116661601 = 17470^2 + 10801^2 .

It is a cyclic number.

It is not a de Polignac number, because 421862501 - 2⁶ = 421862437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421862503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300200 + ... + 301601.

It is an arithmetic number, because the mean of its divisors is an integer number (105616251).

Almost surely, 2^421862501 is an apocalyptic number.

It is an amenable number.

421862501 is a deficient number, since it is larger than the sum of its proper divisors (602503).

421862501 is an equidigital number, since it uses as much as digits as its factorization.

421862501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602502.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 421862501 is about 20539.2916382236. The cubic root of 421862501 is about 749.9925931120.

The spelling of 421862501 in words is "four hundred twenty-one million, eight hundred sixty-two thousand, five hundred one".