42145265 has 8 divisors (see below), whose sum is σ = 52318440. Its totient is φ = 32553472.

The previous prime is 42145247. The next prime is 42145277. The reversal of 42145265 is 56254124.

It can be written as a sum of positive squares in 4 ways, for example, as 10863616 + 31281649 = 3296^2 + 5593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42145265 - 2⁸ = 42145009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145184 + ... + 145473.

It is an arithmetic number, because the mean of its divisors is an integer number (6539805).

Almost surely, 2^42145265 is an apocalyptic number.

It is an amenable number.

42145265 is a deficient number, since it is larger than the sum of its proper divisors (10173175).

42145265 is a wasteful number, since it uses less digits than its factorization.

42145265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290691.

The product of its digits is 9600, while the sum is 29.

The square root of 42145265 is about 6491.9384624317. The cubic root of 42145265 is about 348.0029533594.

Adding to 42145265 its reverse (56254124), we get a palindrome (98399389).

The spelling of 42145265 in words is "forty-two million, one hundred forty-five thousand, two hundred sixty-five".