42501869 has 2 divisors, whose sum is σ = 42501870. Its totient is φ = 42501868.

The previous prime is 42501857. The next prime is 42501883. The reversal of 42501869 is 96810524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42445225 + 56644 = 6515^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 42501869 - 2¹⁶ = 42436333 is a prime.

It is a super-2 number, since 2×42501869² = 3612817736986322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42501839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21250934 + 21250935.

It is an arithmetic number, because the mean of its divisors is an integer number (21250935).

Almost surely, 2^42501869 is an apocalyptic number.

It is an amenable number.

42501869 is a deficient number, since it is larger than the sum of its proper divisors (1).

42501869 is an equidigital number, since it uses as much as digits as its factorization.

42501869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 42501869 is about 6519.3457493831. The cubic root of 42501869 is about 348.9817178569.

The spelling of 42501869 in words is "forty-two million, five hundred one thousand, eight hundred sixty-nine".