42161235 has 32 divisors (see below), whose sum is σ = 69346368. Its totient is φ = 21864960.

The previous prime is 42161233. The next prime is 42161237. The reversal of 42161235 is 53216124.

It is an interprime number because it is at equal distance from previous prime (42161233) and next prime (42161237).

It is not a de Polignac number, because 42161235 - 2¹ = 42161233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42161233) 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, 143749 + ... + 144041.

It is an arithmetic number, because the mean of its divisors is an integer number (2167074).

Almost surely, 2^42161235 is an apocalyptic number.

42161235 is a deficient number, since it is larger than the sum of its proper divisors (27185133).

42161235 is a wasteful number, since it uses less digits than its factorization.

42161235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535.

The product of its digits is 1440, while the sum is 24.

The square root of 42161235 is about 6493.1683329481. The cubic root of 42161235 is about 348.0469037718.

Adding to 42161235 its reverse (53216124), we get a palindrome (95377359).

The spelling of 42161235 in words is "forty-two million, one hundred sixty-one thousand, two hundred thirty-five".