42243269 has 2 divisors, whose sum is σ = 42243270. Its totient is φ = 42243268.

The previous prime is 42243263. The next prime is 42243281. The reversal of 42243269 is 96234224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38912644 + 3330625 = 6238^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 42243269 - 2⁸ = 42243013 is a prime.

It is a super-2 number, since 2×42243269² = 3568987551612722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42243263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121634 + 21121635.

It is an arithmetic number, because the mean of its divisors is an integer number (21121635).

Almost surely, 2^42243269 is an apocalyptic number.

It is an amenable number.

42243269 is a deficient number, since it is larger than the sum of its proper divisors (1).

42243269 is an equidigital number, since it uses as much as digits as its factorization.

42243269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 32.

The square root of 42243269 is about 6499.4822101457. The cubic root of 42243269 is about 348.2724915803.

The spelling of 42243269 in words is "forty-two million, two hundred forty-three thousand, two hundred sixty-nine".