421357 has 8 divisors (see below), whose sum is σ = 443520. Its totient is φ = 399840.

The previous prime is 421349. The next prime is 421361. The reversal of 421357 is 753124.

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 421357 - 2³ = 421349 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 (421397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1644 + ... + 1882.

It is an arithmetic number, because the mean of its divisors is an integer number (55440).

2⁴²¹³⁵⁷ is an apocalyptic number.

It is an amenable number.

421357 is a deficient number, since it is larger than the sum of its proper divisors (22163).

421357 is a wasteful number, since it uses less digits than its factorization.

421357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323.

The product of its digits is 840, while the sum is 22.

The square root of 421357 is about 649.1201737737. The cubic root of 421357 is about 74.9692911316.

The spelling of 421357 in words is "four hundred twenty-one thousand, three hundred fifty-seven".