421057 has 12 divisors (see below), whose sum is σ = 528276. Its totient is φ = 332640.

The previous prime is 421049. The next prime is 421079. The reversal of 421057 is 750124.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 226576 = 441^2 + 476^2 .

It is not a de Polignac number, because 421057 - 2³ = 421049 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421037) 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, 307 + ... + 967.

It is an arithmetic number, because the mean of its divisors is an integer number (44023).

2⁴²¹⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

421057 is a deficient number, since it is larger than the sum of its proper divisors (107219).

421057 is a wasteful number, since it uses less digits than its factorization.

421057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 421057 is about 648.8890506088. The cubic root of 421057 is about 74.9514945623.

The spelling of 421057 in words is "four hundred twenty-one thousand, fifty-seven".