521379 has 12 divisors (see below), whose sum is σ = 793000. Its totient is φ = 329184.

The previous prime is 521377. The next prime is 521393. The reversal of 521379 is 973125.

It is not a de Polignac number, because 521379 - 2¹ = 521377 is a prime.

It is a Duffinian number.

521379 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (521377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1354 + ... + 1695.

2⁵²¹³⁷⁹ is an apocalyptic number.

521379 is a deficient number, since it is larger than the sum of its proper divisors (271621).

521379 is a wasteful number, since it uses less digits than its factorization.

521379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074 (or 3071 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 521379 is about 722.0657864766. The cubic root of 521379 is about 80.4855367969.

It can be divided in two parts, 521 and 379, that added together give a square (900 = 30²).

The spelling of 521379 in words is "five hundred twenty-one thousand, three hundred seventy-nine".