42742697 has 2 divisors, whose sum is σ = 42742698. Its totient is φ = 42742696.

The previous prime is 42742691. The next prime is 42742699. The reversal of 42742697 is 79624724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40398736 + 2343961 = 6356^2 + 1531^2 .

It is a cyclic number.

It is not a de Polignac number, because 42742697 - 2⁴ = 42742681 is a prime.

Together with 42742699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42742691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21371348 + 21371349.

It is an arithmetic number, because the mean of its divisors is an integer number (21371349).

Almost surely, 2^42742697 is an apocalyptic number.

It is an amenable number.

42742697 is a deficient number, since it is larger than the sum of its proper divisors (1).

42742697 is an equidigital number, since it uses as much as digits as its factorization.

42742697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 41.

The square root of 42742697 is about 6537.7899170897. The cubic root of 42742697 is about 349.6396208981.

The spelling of 42742697 in words is "forty-two million, seven hundred forty-two thousand, six hundred ninety-seven".