42641969 has 2 divisors, whose sum is σ = 42641970. Its totient is φ = 42641968.

The previous prime is 42641881. The next prime is 42641981. The reversal of 42641969 is 96914624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34869025 + 7772944 = 5905^2 + 2788^2 .

It is a cyclic number.

It is not a de Polignac number, because 42641969 - 2⁸ = 42641713 is a prime.

It is a super-2 number, since 2×42641969² = 3636675040393922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42641069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21320984 + 21320985.

It is an arithmetic number, because the mean of its divisors is an integer number (21320985).

Almost surely, 2^42641969 is an apocalyptic number.

It is an amenable number.

42641969 is a deficient number, since it is larger than the sum of its proper divisors (1).

42641969 is an equidigital number, since it uses as much as digits as its factorization.

42641969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 42641969 is about 6530.0818524732. The cubic root of 42641969 is about 349.3647497587.

The spelling of 42641969 in words is "forty-two million, six hundred forty-one thousand, nine hundred sixty-nine".