42145351 has 4 divisors (see below), whose sum is σ = 42345304. Its totient is φ = 41945400.

The previous prime is 42145343. The next prime is 42145379. The reversal of 42145351 is 15354124.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42145351 - 2³ = 42145343 is a prime.

It is a super-2 number, since 2×42145351² = 3552461221826402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42145321) 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, 99660 + ... + 100081.

It is an arithmetic number, because the mean of its divisors is an integer number (10586326).

Almost surely, 2^42145351 is an apocalyptic number.

42145351 is a deficient number, since it is larger than the sum of its proper divisors (199953).

42145351 is a wasteful number, since it uses less digits than its factorization.

42145351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199952.

The product of its digits is 2400, while the sum is 25.

The square root of 42145351 is about 6491.9450860278. The cubic root of 42145351 is about 348.0031900663.

Adding to 42145351 its reverse (15354124), we get a palindrome (57499475).

The spelling of 42145351 in words is "forty-two million, one hundred forty-five thousand, three hundred fifty-one".