42145497 has 24 divisors (see below), whose sum is σ = 63577800. Its totient is φ = 26869248.

The previous prime is 42145489. The next prime is 42145507. The reversal of 42145497 is 79454124.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1390041 + 40755456 = 1179^2 + 6384^2 .

It is not a de Polignac number, because 42145497 - 2³ = 42145489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42145457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28779 + ... + 30207.

It is an arithmetic number, because the mean of its divisors is an integer number (2649075).

Almost surely, 2^42145497 is an apocalyptic number.

It is an amenable number.

42145497 is a deficient number, since it is larger than the sum of its proper divisors (21432303).

42145497 is a wasteful number, since it uses less digits than its factorization.

42145497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577 (or 1574 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 42145497 is about 6491.9563307219. The cubic root of 42145497 is about 348.0035919169.

The spelling of 42145497 in words is "forty-two million, one hundred forty-five thousand, four hundred ninety-seven".