321440461 has 8 divisors (see below), whose sum is σ = 338798880. Its totient is φ = 304126128.

The previous prime is 321440411. The next prime is 321440467. The reversal of 321440461 is 164044123.

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 321440461 - 2¹⁵ = 321407693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321440467) 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, 4530 + ... + 25756.

It is an arithmetic number, because the mean of its divisors is an integer number (42349860).

Almost surely, 2^321440461 is an apocalyptic number.

It is an amenable number.

321440461 is a deficient number, since it is larger than the sum of its proper divisors (17358419).

321440461 is a wasteful number, since it uses less digits than its factorization.

321440461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22043.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 321440461 is about 17928.7607212546. The cubic root of 321440461 is about 685.0151565723.

Adding to 321440461 its reverse (164044123), we get a palindrome (485484584).

The spelling of 321440461 in words is "three hundred twenty-one million, four hundred forty thousand, four hundred sixty-one".