421572441 has 32 divisors (see below), whose sum is σ = 598440960. Its totient is φ = 263852160.

The previous prime is 421572439. The next prime is 421572457. The reversal of 421572441 is 144275124.

It is not a de Polignac number, because 421572441 - 2¹ = 421572439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421572399 and 421572408.

It is not an unprimeable number, because it can be changed into a prime (421572421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4736725 + ... + 4736813.

It is an arithmetic number, because the mean of its divisors is an integer number (18701280).

Almost surely, 2^421572441 is an apocalyptic number.

It is an amenable number.

421572441 is a deficient number, since it is larger than the sum of its proper divisors (176868519).

421572441 is an frugal number, since it uses more digits than its factorization.

421572441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 176 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 421572441 is about 20532.2293236755. The cubic root of 421572441 is about 749.8206628988.

The spelling of 421572441 in words is "four hundred twenty-one million, five hundred seventy-two thousand, four hundred forty-one".