42145315 has 16 divisors (see below), whose sum is σ = 53452800. Its totient is φ = 31835232.

The previous prime is 42145297. The next prime is 42145319. The reversal of 42145315 is 51354124.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42145315 - 2⁹ = 42144803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42145315.

It is not an unprimeable number, because it can be changed into a prime (42145319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6766 + ... + 11404.

It is an arithmetic number, because the mean of its divisors is an integer number (3340800).

Almost surely, 2^42145315 is an apocalyptic number.

42145315 is a deficient number, since it is larger than the sum of its proper divisors (11307485).

42145315 is a wasteful number, since it uses less digits than its factorization.

42145315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4746.

The product of its digits is 2400, while the sum is 25.

The square root of 42145315 is about 6491.9423133605. The cubic root of 42145315 is about 348.0030909797.

Adding to 42145315 its reverse (51354124), we get a palindrome (93499439).

The spelling of 42145315 in words is "forty-two million, one hundred forty-five thousand, three hundred fifteen".