521396 has 6 divisors (see below), whose sum is σ = 912450. Its totient is φ = 260696.

The previous prime is 521393. The next prime is 521399. The reversal of 521396 is 693125.

It is an interprime number because it is at equal distance from previous prime (521393) and next prime (521399).

It can be written as a sum of positive squares in only one way, i.e., 376996 + 144400 = 614^2 + 380^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65171 + ... + 65178.

It is an arithmetic number, because the mean of its divisors is an integer number (152075).

2⁵²¹³⁹⁶ is an apocalyptic number.

It is an amenable number.

521396 is a deficient number, since it is larger than the sum of its proper divisors (391054).

521396 is a wasteful number, since it uses less digits than its factorization.

521396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130353 (or 130351 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 521396 is about 722.0775581612. The cubic root of 521396 is about 80.4864115536.

The spelling of 521396 in words is "five hundred twenty-one thousand, three hundred ninety-six".