42097145 has 4 divisors (see below), whose sum is σ = 50516580. Its totient is φ = 33677712.

The previous prime is 42097109. The next prime is 42097147. The reversal of 42097145 is 54179024.

It is a happy number.

42097145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31933801 + 10163344 = 5651^2 + 3188^2 .

It is a cyclic number.

It is not a de Polignac number, because 42097145 - 2¹⁴ = 42080761 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42097147) 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 in 3 ways as a sum of consecutive naturals, for example, 4209710 + ... + 4209719.

It is an arithmetic number, because the mean of its divisors is an integer number (12629145).

Almost surely, 2^42097145 is an apocalyptic number.

It is an amenable number.

42097145 is a deficient number, since it is larger than the sum of its proper divisors (8419435).

42097145 is an equidigital number, since it uses as much as digits as its factorization.

42097145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8419434.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 42097145 is about 6488.2312689977. The cubic root of 42097145 is about 347.8704570243.

The spelling of 42097145 in words is "forty-two million, ninety-seven thousand, one hundred forty-five".