42053381 has 2 divisors, whose sum is σ = 42053382. Its totient is φ = 42053380.

The previous prime is 42053377. The next prime is 42053387. The reversal of 42053381 is 18335024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38328481 + 3724900 = 6191^2 + 1930^2 .

It is a cyclic number.

It is not a de Polignac number, because 42053381 - 2² = 42053377 is a prime.

It is a super-2 number, since 2×42053381² = 3536973707062322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42053381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42053387) 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, 21026690 + 21026691.

It is an arithmetic number, because the mean of its divisors is an integer number (21026691).

Almost surely, 2^42053381 is an apocalyptic number.

It is an amenable number.

42053381 is a deficient number, since it is larger than the sum of its proper divisors (1).

42053381 is an equidigital number, since it uses as much as digits as its factorization.

42053381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 42053381 is about 6484.8578241932. The cubic root of 42053381 is about 347.7498670460.

The spelling of 42053381 in words is "forty-two million, fifty-three thousand, three hundred eighty-one".