42529381 has 2 divisors, whose sum is σ = 42529382. Its totient is φ = 42529380.

The previous prime is 42529363. The next prime is 42529439. The reversal of 42529381 is 18392524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35212356 + 7317025 = 5934^2 + 2705^2 .

It is a cyclic number.

It is not a de Polignac number, because 42529381 - 2¹³ = 42521189 is a prime.

It is a super-2 number, since 2×42529381² = 3617496496486322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42529351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21264690 + 21264691.

It is an arithmetic number, because the mean of its divisors is an integer number (21264691).

Almost surely, 2^42529381 is an apocalyptic number.

It is an amenable number.

42529381 is a deficient number, since it is larger than the sum of its proper divisors (1).

42529381 is an equidigital number, since it uses as much as digits as its factorization.

42529381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 42529381 is about 6521.4554357137. The cubic root of 42529381 is about 349.0570017157.

The spelling of 42529381 in words is "forty-two million, five hundred twenty-nine thousand, three hundred eighty-one".