421547 has 8 divisors (see below), whose sum is σ = 492000. Its totient is φ = 361032.

The previous prime is 421517. The next prime is 421559. The reversal of 421547 is 745124.

It is not a de Polignac number, because 421547 - 2⁶ = 421483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421517) 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, 272 + ... + 957.

It is an arithmetic number, because the mean of its divisors is an integer number (61500).

2⁴²¹⁵⁴⁷ is an apocalyptic number.

421547 is a deficient number, since it is larger than the sum of its proper divisors (70453).

421547 is an equidigital number, since it uses as much as digits as its factorization.

421547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250 (or 1236 counting only the distinct ones).

The product of its digits is 1120, while the sum is 23.

The square root of 421547 is about 649.2665092241. The cubic root of 421547 is about 74.9805579235.

The spelling of 421547 in words is "four hundred twenty-one thousand, five hundred forty-seven".