601673521 has 4 divisors (see below), whose sum is σ = 602495092. Its totient is φ = 600851952.

The previous prime is 601673489. The next prime is 601673531. The reversal of 601673521 is 125376106.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 598291600 + 3381921 = 24460^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 601673521 - 2⁵ = 601673489 is a prime.

It is a super-2 number, since 2×601673521² = 724022051745074882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (601673531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409686 + ... + 411151.

It is an arithmetic number, because the mean of its divisors is an integer number (150623773).

Almost surely, 2^601673521 is an apocalyptic number.

It is an amenable number.

601673521 is a deficient number, since it is larger than the sum of its proper divisors (821571).

601673521 is an equidigital number, since it uses as much as digits as its factorization.

601673521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821570.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 601673521 is about 24529.0342451553. The cubic root of 601673521 is about 844.2161052938.

The spelling of 601673521 in words is "six hundred one million, six hundred seventy-three thousand, five hundred twenty-one".