321420434 has 8 divisors (see below), whose sum is σ = 482207628. Its totient is φ = 160684560.

The previous prime is 321420413. The next prime is 321420457. The reversal of 321420434 is 434024123.

It can be written as a sum of positive squares in 2 ways, for example, as 316733209 + 4687225 = 17797^2 + 2165^2 .

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

It is a super-2 number, since 2×321420434² = 206622190785496712, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14324 + ... + 29120.

Almost surely, 2^321420434 is an apocalyptic number.

321420434 is a deficient number, since it is larger than the sum of its proper divisors (160787194).

321420434 is a wasteful number, since it uses less digits than its factorization.

321420434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25660.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 321420434 is about 17928.2021965394. The cubic root of 321420434 is about 685.0009299009. Note that the first 3 decimals are identical.

Adding to 321420434 its reverse (434024123), we get a palindrome (755444557).

The spelling of 321420434 in words is "three hundred twenty-one million, four hundred twenty thousand, four hundred thirty-four".