381527 has 2 divisors, whose sum is σ = 381528. Its totient is φ = 381526.

The previous prime is 381523. The next prime is 381529. The reversal of 381527 is 725183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381527 - 2² = 381523 is a prime.

Together with 381529, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 381496 and 381505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190763 + 190764.

It is an arithmetic number, because the mean of its divisors is an integer number (190764).

2³⁸¹⁵²⁷ is an apocalyptic number.

381527 is a deficient number, since it is larger than the sum of its proper divisors (1).

381527 is an equidigital number, since it uses as much as digits as its factorization.

381527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 26.

The square root of 381527 is about 617.6787190765. The cubic root of 381527 is about 72.5284549423.

Subtracting from 381527 its sum of digits (26), we obtain a triangular number (381501 = T₈₇₃).

The spelling of 381527 in words is "three hundred eighty-one thousand, five hundred twenty-seven".