42140234 has 4 divisors (see below), whose sum is σ = 63210354. Its totient is φ = 21070116.

The previous prime is 42140201. The next prime is 42140237. The reversal of 42140234 is 43204124.

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

It can be written as a sum of positive squares in only one way, i.e., 39025009 + 3115225 = 6247^2 + 1765^2 .

It is not an unprimeable number, because it can be changed into a prime (42140237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10535057 + ... + 10535060.

Almost surely, 2^42140234 is an apocalyptic number.

42140234 is a deficient number, since it is larger than the sum of its proper divisors (21070120).

42140234 is a wasteful number, since it uses less digits than its factorization.

42140234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21070119.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 42140234 is about 6491.5509702998. The cubic root of 42140234 is about 347.9891054413.

Adding to 42140234 its reverse (43204124), we get a palindrome (85344358).

The spelling of 42140234 in words is "forty-two million, one hundred forty thousand, two hundred thirty-four".