42100501 has 2 divisors, whose sum is σ = 42100502. Its totient is φ = 42100500.

The previous prime is 42100493. The next prime is 42100519. The reversal of 42100501 is 10500124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38452401 + 3648100 = 6201^2 + 1910^2 .

It is a cyclic number.

It is not a de Polignac number, because 42100501 - 2³ = 42100493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42100001) 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, 21050250 + 21050251.

It is an arithmetic number, because the mean of its divisors is an integer number (21050251).

Almost surely, 2^42100501 is an apocalyptic number.

It is an amenable number.

42100501 is a deficient number, since it is larger than the sum of its proper divisors (1).

42100501 is an equidigital number, since it uses as much as digits as its factorization.

42100501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 42100501 is about 6488.4898859442. The cubic root of 42100501 is about 347.8797008992.

Adding to 42100501 its reverse (10500124), we get a palindrome (52600625).

The spelling of 42100501 in words is "forty-two million, one hundred thousand, five hundred one".