42145651 has 2 divisors, whose sum is σ = 42145652. Its totient is φ = 42145650.

The previous prime is 42145639. The next prime is 42145679. The reversal of 42145651 is 15654124.

42145651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (42145679) can be obtained adding 42145651 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42145651 - 2⁵ = 42145619 is a prime.

It is not a weakly prime, because it can be changed into another prime (42145751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21072825 + 21072826.

It is an arithmetic number, because the mean of its divisors is an integer number (21072826).

Almost surely, 2^42145651 is an apocalyptic number.

42145651 is a deficient number, since it is larger than the sum of its proper divisors (1).

42145651 is an equidigital number, since it uses as much as digits as its factorization.

42145651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 28.

The square root of 42145651 is about 6491.9681915425. The cubic root of 42145651 is about 348.0040157858.

Adding to 42145651 its reverse (15654124), we get a palindrome (57799775).

The spelling of 42145651 in words is "forty-two million, one hundred forty-five thousand, six hundred fifty-one".