421047 has 12 divisors (see below), whose sum is σ = 663624. Its totient is φ = 255120.

The previous prime is 421037. The next prime is 421049. The reversal of 421047 is 740124.

It is a happy number.

It is not a de Polignac number, because 421047 - 2⁷ = 420919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2028 + ... + 2225.

It is an arithmetic number, because the mean of its divisors is an integer number (55302).

2⁴²¹⁰⁴⁷ is an apocalyptic number.

421047 is a deficient number, since it is larger than the sum of its proper divisors (242577).

421047 is a wasteful number, since it uses less digits than its factorization.

421047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270 (or 4267 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 421047 is about 648.8813450855. The cubic root of 421047 is about 74.9509011978.

It can be divided in two parts, 42 and 1047, that added together give a square (1089 = 33²).

The spelling of 421047 in words is "four hundred twenty-one thousand, forty-seven", and thus it is an iban number.