42161253 has 4 divisors (see below), whose sum is σ = 56215008. Its totient is φ = 28107500.

The previous prime is 42161237. The next prime is 42161269. The reversal of 42161253 is 35216124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (42161237) and next prime (42161269).

It is a cyclic number.

It is not a de Polignac number, because 42161253 - 2⁴ = 42161237 is a prime.

It is a Curzon number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 7026873 + ... + 7026878.

It is an arithmetic number, because the mean of its divisors is an integer number (14053752).

Almost surely, 2^42161253 is an apocalyptic number.

It is an amenable number.

42161253 is a deficient number, since it is larger than the sum of its proper divisors (14053755).

42161253 is a wasteful number, since it uses less digits than its factorization.

42161253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14053754.

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

The square root of 42161253 is about 6493.1697190201. The cubic root of 42161253 is about 348.0469533026.

Adding to 42161253 its reverse (35216124), we get a palindrome (77377377).

The spelling of 42161253 in words is "forty-two million, one hundred sixty-one thousand, two hundred fifty-three".