42401501 has 2 divisors, whose sum is σ = 42401502. Its totient is φ = 42401500.

The previous prime is 42401479. The next prime is 42401531. The reversal of 42401501 is 10510424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26988025 + 15413476 = 5195^2 + 3926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42401501 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 42401501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42401531) 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, 21200750 + 21200751.

It is an arithmetic number, because the mean of its divisors is an integer number (21200751).

Almost surely, 2^42401501 is an apocalyptic number.

It is an amenable number.

42401501 is a deficient number, since it is larger than the sum of its proper divisors (1).

42401501 is an equidigital number, since it uses as much as digits as its factorization.

42401501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 42401501 is about 6511.6434945411. The cubic root of 42401501 is about 348.7067950058.

Adding to 42401501 its reverse (10510424), we get a palindrome (52911925).

The spelling of 42401501 in words is "forty-two million, four hundred one thousand, five hundred one".