42142769 has 2 divisors, whose sum is σ = 42142770. Its totient is φ = 42142768.

The previous prime is 42142753. The next prime is 42142781. The reversal of 42142769 is 96724124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26142769 + 16000000 = 5113^2 + 4000^2 .

It is a cyclic number.

It is not a de Polignac number, because 42142769 - 2⁴ = 42142753 is a prime.

It is a super-2 number, since 2×42142769² = 3552025957974722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42142729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21071384 + 21071385.

It is an arithmetic number, because the mean of its divisors is an integer number (21071385).

Almost surely, 2^42142769 is an apocalyptic number.

It is an amenable number.

42142769 is a deficient number, since it is larger than the sum of its proper divisors (1).

42142769 is an equidigital number, since it uses as much as digits as its factorization.

42142769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

The square root of 42142769 is about 6491.7462211642. The cubic root of 42142769 is about 347.9960832122.

The spelling of 42142769 in words is "forty-two million, one hundred forty-two thousand, seven hundred sixty-nine".