42397651 has 2 divisors, whose sum is σ = 42397652. Its totient is φ = 42397650.

The previous prime is 42397637. The next prime is 42397657. The reversal of 42397651 is 15679324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42397651 - 2⁹ = 42397139 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42397651.

It is not a weakly prime, because it can be changed into another prime (42397657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21198825 + 21198826.

It is an arithmetic number, because the mean of its divisors is an integer number (21198826).

Almost surely, 2^42397651 is an apocalyptic number.

42397651 is a deficient number, since it is larger than the sum of its proper divisors (1).

42397651 is an equidigital number, since it uses as much as digits as its factorization.

42397651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 42397651 is about 6511.3478635379. The cubic root of 42397651 is about 348.6962406483.

The spelling of 42397651 in words is "forty-two million, three hundred ninety-seven thousand, six hundred fifty-one".