421534 has 8 divisors (see below), whose sum is σ = 665640. Its totient is φ = 199656.

The previous prime is 421517. The next prime is 421559. The reversal of 421534 is 435124.

421534 = T₉₂ + T₉₃ + ... + T₁₄₈.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5509 + ... + 5584.

It is an arithmetic number, because the mean of its divisors is an integer number (83205).

2⁴²¹⁵³⁴ is an apocalyptic number.

421534 is a deficient number, since it is larger than the sum of its proper divisors (244106).

421534 is a wasteful number, since it uses less digits than its factorization.

421534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11114.

The product of its digits is 480, while the sum is 19.

The square root of 421534 is about 649.2564978497. The cubic root of 421534 is about 74.9797871456.

Adding to 421534 its reverse (435124), we get a palindrome (856658).

The spelling of 421534 in words is "four hundred twenty-one thousand, five hundred thirty-four".