642552503 has 2 divisors, whose sum is σ = 642552504. Its totient is φ = 642552502.

The previous prime is 642552481. The next prime is 642552509. The reversal of 642552503 is 305255246.

642552503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642552503 - 2¹⁰ = 642551479 is a prime.

It is a super-2 number, since 2×642552503² = 825747438223130018, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 642552503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642552509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321276251 + 321276252.

It is an arithmetic number, because the mean of its divisors is an integer number (321276252).

Almost surely, 2^642552503 is an apocalyptic number.

642552503 is a deficient number, since it is larger than the sum of its proper divisors (1).

642552503 is an equidigital number, since it uses as much as digits as its factorization.

642552503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 642552503 is about 25348.6193509627. The cubic root of 642552503 is about 862.9180231732.

The spelling of 642552503 in words is "six hundred forty-two million, five hundred fifty-two thousand, five hundred three".