427521 has 8 divisors (see below), whose sum is σ = 588544. Its totient is φ = 275760.

The previous prime is 427517. The next prime is 427523. The reversal of 427521 is 125724.

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

It is not a de Polignac number, because 427521 - 2² = 427517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427523) 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, 2206 + ... + 2391.

It is an arithmetic number, because the mean of its divisors is an integer number (73568).

2⁴²⁷⁵²¹ is an apocalyptic number.

It is an amenable number.

427521 is a deficient number, since it is larger than the sum of its proper divisors (161023).

427521 is a wasteful number, since it uses less digits than its factorization.

427521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4631.

The product of its digits is 560, while the sum is 21.

The square root of 427521 is about 653.8509004353. The cubic root of 427521 is about 75.3330962132. Note that the first 3 decimals are identical.

The spelling of 427521 in words is "four hundred twenty-seven thousand, five hundred twenty-one".