320572741 has 4 divisors (see below), whose sum is σ = 320613984. Its totient is φ = 320531500.

The previous prime is 320572729. The next prime is 320572793. The reversal of 320572741 is 147275023.

It is the 7310-th star number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 320572741 - 2⁵ = 320572709 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320572841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5035 + ... + 25816.

It is an arithmetic number, because the mean of its divisors is an integer number (80153496).

Almost surely, 2^320572741 is an apocalyptic number.

It is an amenable number.

320572741 is a deficient number, since it is larger than the sum of its proper divisors (41243).

320572741 is a wasteful number, since it uses less digits than its factorization.

320572741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41242.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 320572741 is about 17904.5452609107. The cubic root of 320572741 is about 684.3982076768.

The spelling of 320572741 in words is "three hundred twenty million, five hundred seventy-two thousand, seven hundred forty-one".