42457501 has 2 divisors, whose sum is σ = 42457502. Its totient is φ = 42457500.

The previous prime is 42457477. The next prime is 42457529. The reversal of 42457501 is 10575424.

It is an a-pointer prime, because the next prime (42457529) can be obtained adding 42457501 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39564100 + 2893401 = 6290^2 + 1701^2 .

It is a cyclic number.

It is not a de Polignac number, because 42457501 - 2²¹ = 40360349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42457501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42457561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21228750 + 21228751.

It is an arithmetic number, because the mean of its divisors is an integer number (21228751).

Almost surely, 2^42457501 is an apocalyptic number.

It is an amenable number.

42457501 is a deficient number, since it is larger than the sum of its proper divisors (1).

42457501 is an equidigital number, since it uses as much as digits as its factorization.

42457501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 42457501 is about 6515.9420654269. The cubic root of 42457501 is about 348.8602407535.

The spelling of 42457501 in words is "forty-two million, four hundred fifty-seven thousand, five hundred one".