513445 has 8 divisors (see below), whose sum is σ = 637560. Its totient is φ = 396480.

The previous prime is 513439. The next prime is 513473. The reversal of 513445 is 544315.

It can be written as a sum of positive squares in 4 ways, for example, as 42849 + 470596 = 207^2 + 686^2 .

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

It is not a de Polignac number, because 513445 - 2¹⁷ = 382373 is a prime.

It is a congruent number.

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, 1626 + ... + 1915.

It is an arithmetic number, because the mean of its divisors is an integer number (79695).

2⁵¹³⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

513445 is a deficient number, since it is larger than the sum of its proper divisors (124115).

513445 is a wasteful number, since it uses less digits than its factorization.

513445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575.

The product of its digits is 1200, while the sum is 22.

The square root of 513445 is about 716.5507658219. The cubic root of 513445 is about 80.0751897258.

The spelling of 513445 in words is "five hundred thirteen thousand, four hundred forty-five".