421690601 has 4 divisors (see below), whose sum is σ = 421748100. Its totient is φ = 421633104.

The previous prime is 421690597. The next prime is 421690639. The reversal of 421690601 is 106096124.

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 210279001 + 211411600 = 14501^2 + 14540^2 .

It is a cyclic number.

It is not a de Polignac number, because 421690601 - 2² = 421690597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421690681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15806 + ... + 33063.

It is an arithmetic number, because the mean of its divisors is an integer number (105437025).

Almost surely, 2^421690601 is an apocalyptic number.

It is an amenable number.

421690601 is a deficient number, since it is larger than the sum of its proper divisors (57499).

421690601 is an equidigital number, since it uses as much as digits as its factorization.

421690601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57498.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 421690601 is about 20535.1065495166. The cubic root of 421690601 is about 749.8907105937.

The spelling of 421690601 in words is "four hundred twenty-one million, six hundred ninety thousand, six hundred one".