42207497 has 2 divisors, whose sum is σ = 42207498. Its totient is φ = 42207496.

The previous prime is 42207427. The next prime is 42207509. The reversal of 42207497 is 79470224.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41165056 + 1042441 = 6416^2 + 1021^2 .

It is a cyclic number.

It is not a de Polignac number, because 42207497 - 2¹⁰ = 42206473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42207427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21103748 + 21103749.

It is an arithmetic number, because the mean of its divisors is an integer number (21103749).

Almost surely, 2^42207497 is an apocalyptic number.

It is an amenable number.

42207497 is a deficient number, since it is larger than the sum of its proper divisors (1).

42207497 is an equidigital number, since it uses as much as digits as its factorization.

42207497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 42207497 is about 6496.7297157878. The cubic root of 42207497 is about 348.1741570042.

The spelling of 42207497 in words is "forty-two million, two hundred seven thousand, four hundred ninety-seven".