321400145 has 8 divisors (see below), whose sum is σ = 420742080. Its totient is φ = 233745520.

The previous prime is 321400117. The next prime is 321400187. The reversal of 321400145 is 541004123.

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

It is not a de Polignac number, because 321400145 - 2¹⁶ = 321334609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2921765 + ... + 2921874.

It is an arithmetic number, because the mean of its divisors is an integer number (52592760).

Almost surely, 2^321400145 is an apocalyptic number.

It is an amenable number.

321400145 is a deficient number, since it is larger than the sum of its proper divisors (99341935).

321400145 is a wasteful number, since it uses less digits than its factorization.

321400145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5843655.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 321400145 is about 17927.6363472712. The cubic root of 321400145 is about 684.9865165087.

Adding to 321400145 its reverse (541004123), we get a palindrome (862404268).

The spelling of 321400145 in words is "three hundred twenty-one million, four hundred thousand, one hundred forty-five".