42561503 has 2 divisors, whose sum is σ = 42561504. Its totient is φ = 42561502.

The previous prime is 42561413. The next prime is 42561509. The reversal of 42561503 is 30516524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42561503 - 2¹² = 42557407 is a prime.

It is a super-2 number, since 2×42561503² = 3622963075238018, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42561509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21280751 + 21280752.

It is an arithmetic number, because the mean of its divisors is an integer number (21280752).

Almost surely, 2^42561503 is an apocalyptic number.

42561503 is a deficient number, since it is larger than the sum of its proper divisors (1).

42561503 is an equidigital number, since it uses as much as digits as its factorization.

42561503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 42561503 is about 6523.9177646564. The cubic root of 42561503 is about 349.1448593101.

The spelling of 42561503 in words is "forty-two million, five hundred sixty-one thousand, five hundred three".