421520001 has 24 divisors (see below), whose sum is σ = 657252864. Its totient is φ = 239591520.

The previous prime is 421519991. The next prime is 421520059. The reversal of 421520001 is 100025124.

It is not a de Polignac number, because 421520001 - 2⁹ = 421519489 is a prime.

It is a super-2 number, since 2×421520001² = 355358222486080002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421520101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20571 + ... + 35583.

It is an arithmetic number, because the mean of its divisors is an integer number (27385536).

Almost surely, 2^421520001 is an apocalyptic number.

It is an amenable number.

421520001 is a deficient number, since it is larger than the sum of its proper divisors (235732863).

421520001 is a wasteful number, since it uses less digits than its factorization.

421520001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15221 (or 15214 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 421520001 is about 20530.9522672476. The cubic root of 421520001 is about 749.7895711874.

Adding to 421520001 its reverse (100025124), we get a palindrome (521545125).

The spelling of 421520001 in words is "four hundred twenty-one million, five hundred twenty thousand, one".