42135497 has 2 divisors, whose sum is σ = 42135498. Its totient is φ = 42135496.

The previous prime is 42135491. The next prime is 42135523. The reversal of 42135497 is 79453124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35473936 + 6661561 = 5956^2 + 2581^2 .

It is a cyclic number.

It is not a de Polignac number, because 42135497 - 2⁴ = 42135481 is a prime.

It is not a weakly prime, because it can be changed into another prime (42135491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21067748 + 21067749.

It is an arithmetic number, because the mean of its divisors is an integer number (21067749).

Almost surely, 2^42135497 is an apocalyptic number.

It is an amenable number.

42135497 is a deficient number, since it is larger than the sum of its proper divisors (1).

42135497 is an equidigital number, since it uses as much as digits as its factorization.

42135497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 42135497 is about 6491.1861011683. The cubic root of 42135497 is about 347.9760657560.

The spelling of 42135497 in words is "forty-two million, one hundred thirty-five thousand, four hundred ninety-seven".