421201491 has 8 divisors (see below), whose sum is σ = 563630544. Its totient is φ = 279786720.

The previous prime is 421201483. The next prime is 421201493. The reversal of 421201491 is 194102124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421201491 - 2³ = 421201483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421201493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252600 + ... + 254261.

It is an arithmetic number, because the mean of its divisors is an integer number (70453818).

Almost surely, 2^421201491 is an apocalyptic number.

421201491 is a deficient number, since it is larger than the sum of its proper divisors (142429053).

421201491 is a wasteful number, since it uses less digits than its factorization.

421201491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507141.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 421201491 is about 20523.1939765720. The cubic root of 421201491 is about 749.6006709751.

The spelling of 421201491 in words is "four hundred twenty-one million, two hundred one thousand, four hundred ninety-one".