42982321 has 8 divisors (see below), whose sum is σ = 44577000. Its totient is φ = 41395200.

The previous prime is 42982319. The next prime is 42982333. The reversal of 42982321 is 12328924.

It can be written as a sum of positive squares in 4 ways, for example, as 3857296 + 39125025 = 1964^2 + 6255^2 .

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 42982321 - 2¹ = 42982319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42982021) 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, 11371 + ... + 14671.

It is an arithmetic number, because the mean of its divisors is an integer number (5572125).

Almost surely, 2^42982321 is an apocalyptic number.

It is an amenable number.

42982321 is a deficient number, since it is larger than the sum of its proper divisors (1594679).

42982321 is a wasteful number, since it uses less digits than its factorization.

42982321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3779.

The product of its digits is 6912, while the sum is 31.

The square root of 42982321 is about 6556.0903746059. The cubic root of 42982321 is about 350.2917866089.

The spelling of 42982321 in words is "forty-two million, nine hundred eighty-two thousand, three hundred twenty-one".