526381 has 2 divisors, whose sum is σ = 526382. Its totient is φ = 526380.

The previous prime is 526373. The next prime is 526387. The reversal of 526381 is 183625.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 455625 + 70756 = 675^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 526381 - 2³ = 526373 is a prime.

It is a super-2 number, since 2×526381² = 554153914322, which contains 22 as substring.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (526387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263190 + 263191.

It is an arithmetic number, because the mean of its divisors is an integer number (263191).

2⁵²⁶³⁸¹ is an apocalyptic number.

It is an amenable number.

526381 is a deficient number, since it is larger than the sum of its proper divisors (1).

526381 is an equidigital number, since it uses as much as digits as its factorization.

526381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 526381 is about 725.5211919717. The cubic root of 526381 is about 80.7421051303.

The spelling of 526381 in words is "five hundred twenty-six thousand, three hundred eighty-one".