418421 has 8 divisors (see below), whose sum is σ = 448704. Its totient is φ = 388800.

The previous prime is 418391. The next prime is 418423. The reversal of 418421 is 124814.

418421 = 94² + 95² + ... + 127².

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 418421 - 2⁶ = 418357 is a prime.

It is a super-2 number, since 2×418421² = 350152266482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 418393 and 418402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (418423) 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, 2486 + ... + 2648.

It is an arithmetic number, because the mean of its divisors is an integer number (56088).

2⁴¹⁸⁴²¹ is an apocalyptic number.

It is an amenable number.

418421 is a deficient number, since it is larger than the sum of its proper divisors (30283).

418421 is a wasteful number, since it uses less digits than its factorization.

418421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331.

The product of its digits is 256, while the sum is 20.

The square root of 418421 is about 646.8546977490. The cubic root of 418421 is about 74.7947573704.

The spelling of 418421 in words is "four hundred eighteen thousand, four hundred twenty-one".