42015155 has 32 divisors (see below), whose sum is σ = 62705664. Its totient is φ = 26315136.

The previous prime is 42015151. The next prime is 42015157. The reversal of 42015155 is 55151024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42015155 - 2² = 42015151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42015155.

It is not an unprimeable number, because it can be changed into a prime (42015151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48254 + ... + 49116.

It is an arithmetic number, because the mean of its divisors is an integer number (1959552).

Almost surely, 2^42015155 is an apocalyptic number.

42015155 is a deficient number, since it is larger than the sum of its proper divisors (20690509).

42015155 is a wasteful number, since it uses less digits than its factorization.

42015155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 42015155 is about 6481.9098265866. The cubic root of 42015155 is about 347.6444683370.

Adding to 42015155 its reverse (55151024), we get a palindrome (97166179).

The spelling of 42015155 in words is "forty-two million, fifteen thousand, one hundred fifty-five".