421244001 has 12 divisors (see below), whose sum is σ = 624909012. Its totient is φ = 273239136.

The previous prime is 421243961. The next prime is 421244017. The reversal of 421244001 is 100442124.

421244001 is a `hidden beast` number, since 421 + 244 + 0 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 219632400 + 201611601 = 14820^2 + 14199^2 .

It is not a de Polignac number, because 421244001 - 2⁹ = 421243489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421244051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 632166 + ... + 632831.

It is an arithmetic number, because the mean of its divisors is an integer number (52075751).

Almost surely, 2^421244001 is an apocalyptic number.

It is an amenable number.

421244001 is a deficient number, since it is larger than the sum of its proper divisors (203665011).

421244001 is a wasteful number, since it uses less digits than its factorization.

421244001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265040 (or 1265037 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 421244001 is about 20524.2296079536. The cubic root of 421244001 is about 749.6258880847.

Adding to 421244001 its reverse (100442124), we get a palindrome (521686125).

The spelling of 421244001 in words is "four hundred twenty-one million, two hundred forty-four thousand, one".