42490501 has 2 divisors, whose sum is σ = 42490502. Its totient is φ = 42490500.

The previous prime is 42490477. The next prime is 42490507. The reversal of 42490501 is 10509424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35988001 + 6502500 = 5999^2 + 2550^2 .

It is a cyclic number.

It is not a de Polignac number, because 42490501 - 2²¹ = 40393349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42490507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21245250 + 21245251.

It is an arithmetic number, because the mean of its divisors is an integer number (21245251).

Almost surely, 2^42490501 is an apocalyptic number.

It is an amenable number.

42490501 is a deficient number, since it is larger than the sum of its proper divisors (1).

42490501 is an equidigital number, since it uses as much as digits as its factorization.

42490501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 42490501 is about 6518.4738244469. The cubic root of 42490501 is about 348.9506009671.

Adding to 42490501 its reverse (10509424), we get a palindrome (52999925).

The spelling of 42490501 in words is "forty-two million, four hundred ninety thousand, five hundred one".