42247253 has 2 divisors, whose sum is σ = 42247254. Its totient is φ = 42247252.

The previous prime is 42247237. The next prime is 42247259. The reversal of 42247253 is 35274224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39664804 + 2582449 = 6298^2 + 1607^2 .

It is a cyclic number.

It is not a de Polignac number, because 42247253 - 2⁴ = 42247237 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42247259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21123626 + 21123627.

It is an arithmetic number, because the mean of its divisors is an integer number (21123627).

Almost surely, 2^42247253 is an apocalyptic number.

It is an amenable number.

42247253 is a deficient number, since it is larger than the sum of its proper divisors (1).

42247253 is an equidigital number, since it uses as much as digits as its factorization.

42247253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 29.

The square root of 42247253 is about 6499.7886888729. The cubic root of 42247253 is about 348.2834398649.

The spelling of 42247253 in words is "forty-two million, two hundred forty-seven thousand, two hundred fifty-three".