42520273 has 2 divisors, whose sum is σ = 42520274. Its totient is φ = 42520272.

The previous prime is 42520259. The next prime is 42520327. The reversal of 42520273 is 37202524.

Together with next prime (42520327) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23309584 + 19210689 = 4828^2 + 4383^2 .

It is a cyclic number.

It is not a de Polignac number, because 42520273 - 2⁹ = 42519761 is a prime.

It is not a weakly prime, because it can be changed into another prime (42527273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260136 + 21260137.

It is an arithmetic number, because the mean of its divisors is an integer number (21260137).

Almost surely, 2^42520273 is an apocalyptic number.

It is an amenable number.

42520273 is a deficient number, since it is larger than the sum of its proper divisors (1).

42520273 is an equidigital number, since it uses as much as digits as its factorization.

42520273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 42520273 is about 6520.7570879462. The cubic root of 42520273 is about 349.0320821732.

Adding to 42520273 its reverse (37202524), we get a palindrome (79722797).

The spelling of 42520273 in words is "forty-two million, five hundred twenty thousand, two hundred seventy-three".