42140245 has 12 divisors (see below), whose sum is σ = 58824684. Its totient is φ = 28896000.

The previous prime is 42140243. The next prime is 42140257. The reversal of 42140245 is 54204124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16313521 + 25826724 = 4039^2 + 5082^2 .

It is not a de Polignac number, because 42140245 - 2¹ = 42140243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42140243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85756 + ... + 86245.

It is an arithmetic number, because the mean of its divisors is an integer number (4902057).

Almost surely, 2^42140245 is an apocalyptic number.

It is an amenable number.

42140245 is a deficient number, since it is larger than the sum of its proper divisors (16684439).

42140245 is a wasteful number, since it uses less digits than its factorization.

42140245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172020 (or 172013 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 42140245 is about 6491.5518175549. The cubic root of 42140245 is about 347.9891357202.

Adding to 42140245 its reverse (54204124), we get a palindrome (96344369).

The spelling of 42140245 in words is "forty-two million, one hundred forty thousand, two hundred forty-five".