421320531 has 8 divisors (see below), whose sum is σ = 562063824. Its totient is φ = 280728800.

The previous prime is 421320527. The next prime is 421320539. The reversal of 421320531 is 135023124.

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 421320531 - 2² = 421320527 is a prime.

It is a super-2 number, since 2×421320531² = 355021979684243922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421320498 and 421320507.

It is not an unprimeable number, because it can be changed into a prime (421320539) 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, 31236 + ... + 42641.

It is an arithmetic number, because the mean of its divisors is an integer number (70257978).

Almost surely, 2^421320531 is an apocalyptic number.

421320531 is a deficient number, since it is larger than the sum of its proper divisors (140743293).

421320531 is a wasteful number, since it uses less digits than its factorization.

421320531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75781.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 421320531 is about 20526.0939050760. The cubic root of 421320531 is about 749.6712817246.

Adding to 421320531 its reverse (135023124), we get a palindrome (556343655).

The spelling of 421320531 in words is "four hundred twenty-one million, three hundred twenty thousand, five hundred thirty-one".