42300521 has 2 divisors, whose sum is σ = 42300522. Its totient is φ = 42300520.

The previous prime is 42300499. The next prime is 42300527. The reversal of 42300521 is 12500324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37994896 + 4305625 = 6164^2 + 2075^2 .

It is a cyclic number.

It is not a de Polignac number, because 42300521 - 2⁶ = 42300457 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42300521.

It is not a weakly prime, because it can be changed into another prime (42300527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21150260 + 21150261.

It is an arithmetic number, because the mean of its divisors is an integer number (21150261).

Almost surely, 2^42300521 is an apocalyptic number.

It is an amenable number.

42300521 is a deficient number, since it is larger than the sum of its proper divisors (1).

42300521 is an equidigital number, since it uses as much as digits as its factorization.

42300521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 42300521 is about 6503.8850697103. The cubic root of 42300521 is about 348.4297576259.

Adding to 42300521 its reverse (12500324), we get a palindrome (54800845).

The spelling of 42300521 in words is "forty-two million, three hundred thousand, five hundred twenty-one".