42864541 has 2 divisors, whose sum is σ = 42864542. Its totient is φ = 42864540.

The previous prime is 42864539. The next prime is 42864607. The reversal of 42864541 is 14546824.

42864541 = 4629² + 4630².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21436900 + 21427641 = 4630^2 + 4629^2 .

It is a cyclic number.

It is not a de Polignac number, because 42864541 - 2¹ = 42864539 is a prime.

Together with 42864539, it forms a pair of twin primes.

It is equal to p_2596921 and since 42864541 and 2596921 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 42864497 and 42864506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42864511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21432270 + 21432271.

It is an arithmetic number, because the mean of its divisors is an integer number (21432271).

Almost surely, 2^42864541 is an apocalyptic number.

42864541 is the 4630-th centered square number.

It is an amenable number.

42864541 is a deficient number, since it is larger than the sum of its proper divisors (1).

42864541 is an equidigital number, since it uses as much as digits as its factorization.

42864541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 34.

The square root of 42864541 is about 6547.1017251911. The cubic root of 42864541 is about 349.9715378216.

The spelling of 42864541 in words is "forty-two million, eight hundred sixty-four thousand, five hundred forty-one".