421144487 has 8 divisors (see below), whose sum is σ = 430449600. Its totient is φ = 411853824.

The previous prime is 421144483. The next prime is 421144501. The reversal of 421144487 is 784441124.

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

It is a cyclic number.

It is not a de Polignac number, because 421144487 - 2² = 421144483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421144483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72839 + ... + 78407.

It is an arithmetic number, because the mean of its divisors is an integer number (53806200).

Almost surely, 2^421144487 is an apocalyptic number.

421144487 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

421144487 is a deficient number, since it is larger than the sum of its proper divisors (9305113).

421144487 is a wasteful number, since it uses less digits than its factorization.

421144487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7225.

The product of its digits is 28672, while the sum is 35.

The square root of 421144487 is about 20521.8051593908. The cubic root of 421144487 is about 749.5668533008.

The spelling of 421144487 in words is "four hundred twenty-one million, one hundred forty-four thousand, four hundred eighty-seven".