421051 has 4 divisors (see below), whose sum is σ = 435600. Its totient is φ = 406504.

The previous prime is 421049. The next prime is 421079. The reversal of 421051 is 150124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421051 - 2¹ = 421049 is a prime.

It is a Duffinian number.

421051 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (421081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7231 + ... + 7288.

It is an arithmetic number, because the mean of its divisors is an integer number (108900).

2⁴²¹⁰⁵¹ is an apocalyptic number.

421051 is a deficient number, since it is larger than the sum of its proper divisors (14549).

421051 is a wasteful number, since it uses less digits than its factorization.

421051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14548.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 421051 is about 648.8844273058. The cubic root of 421051 is about 74.9511385447.

Adding to 421051 its reverse (150124), we get a palindrome (571175).

The spelling of 421051 in words is "four hundred twenty-one thousand, fifty-one".