42158306 has 4 divisors (see below), whose sum is σ = 63237462. Its totient is φ = 21079152.

The previous prime is 42158297. The next prime is 42158323. The reversal of 42158306 is 60385124.

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., 39627025 + 2531281 = 6295^2 + 1591^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10539575 + ... + 10539578.

Almost surely, 2^42158306 is an apocalyptic number.

42158306 is a deficient number, since it is larger than the sum of its proper divisors (21079156).

42158306 is a wasteful number, since it uses less digits than its factorization.

42158306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21079155.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 42158306 is about 6492.9427842851. The cubic root of 42158306 is about 348.0388438166.

It can be divided in two parts, 4215 and 8306, that added together give a palindrome (12521).

The spelling of 42158306 in words is "forty-two million, one hundred fifty-eight thousand, three hundred six".