42501253 has 2 divisors, whose sum is σ = 42501254. Its totient is φ = 42501252.

The previous prime is 42501209. The next prime is 42501259. The reversal of 42501253 is 35210524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28227969 + 14273284 = 5313^2 + 3778^2 .

It is a cyclic number.

It is not a de Polignac number, because 42501253 - 2²¹ = 40404101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42501259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21250626 + 21250627.

It is an arithmetic number, because the mean of its divisors is an integer number (21250627).

Almost surely, 2^42501253 is an apocalyptic number.

It is an amenable number.

42501253 is a deficient number, since it is larger than the sum of its proper divisors (1).

42501253 is an equidigital number, since it uses as much as digits as its factorization.

42501253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 42501253 is about 6519.2985052074. The cubic root of 42501253 is about 348.9800318622.

Adding to 42501253 its reverse (35210524), we get a palindrome (77711777).

The spelling of 42501253 in words is "forty-two million, five hundred one thousand, two hundred fifty-three".