42203129 has 4 divisors (see below), whose sum is σ = 44685684. Its totient is φ = 39720576.

The previous prime is 42203111. The next prime is 42203131. The reversal of 42203129 is 92130224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24730729 + 17472400 = 4973^2 + 4180^2 .

It is a cyclic number.

It is not a de Polignac number, because 42203129 - 2¹² = 42199033 is a prime.

It is a super-2 number, since 2×42203129² = 3562208194781282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42203179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1241252 + ... + 1241285.

It is an arithmetic number, because the mean of its divisors is an integer number (11171421).

Almost surely, 2^42203129 is an apocalyptic number.

It is an amenable number.

42203129 is a deficient number, since it is larger than the sum of its proper divisors (2482555).

42203129 is a wasteful number, since it uses less digits than its factorization.

42203129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482554.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42203129 is about 6496.3935379563. The cubic root of 42203129 is about 348.1621458901.

The spelling of 42203129 in words is "forty-two million, two hundred three thousand, one hundred twenty-nine".