421572601 has 4 divisors (see below), whose sum is σ = 421623972. Its totient is φ = 421521232.

The previous prime is 421572587. The next prime is 421572611. The reversal of 421572601 is 106275124.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 160782400 + 260790201 = 12680^2 + 16149^2 .

It is a cyclic number.

It is not a de Polignac number, because 421572601 - 2¹⁷ = 421441529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421572601.

It is not an unprimeable number, because it can be changed into a prime (421572611) 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, 10306 + ... + 30811.

It is an arithmetic number, because the mean of its divisors is an integer number (105405993).

Almost surely, 2^421572601 is an apocalyptic number.

It is an amenable number.

421572601 is a deficient number, since it is larger than the sum of its proper divisors (51371).

421572601 is a wasteful number, since it uses less digits than its factorization.

421572601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51370.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 421572601 is about 20532.2332199885. The cubic root of 421572601 is about 749.8207577590.

The spelling of 421572601 in words is "four hundred twenty-one million, five hundred seventy-two thousand, six hundred one".