320427421 has 8 divisors (see below), whose sum is σ = 334816704. Its totient is φ = 306076320.

The previous prime is 320427413. The next prime is 320427427. The reversal of 320427421 is 124724023.

It is a happy number.

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 320427421 - 2³ = 320427413 is a prime.

It is a super-2 number, since 2×320427421² = 205347464257422482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320427427) 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, 8350 + ... + 26656.

It is an arithmetic number, because the mean of its divisors is an integer number (41852088).

Almost surely, 2^320427421 is an apocalyptic number.

It is an amenable number.

320427421 is a deficient number, since it is larger than the sum of its proper divisors (14389283).

320427421 is a wasteful number, since it uses less digits than its factorization.

320427421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19091.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 320427421 is about 17900.4866134974. The cubic root of 320427421 is about 684.2947763626.

It can be divided in two parts, 3204 and 27421, that added together give a square (30625 = 175²).

The spelling of 320427421 in words is "three hundred twenty million, four hundred twenty-seven thousand, four hundred twenty-one".