42495778 has 8 divisors (see below), whose sum is σ = 68647068. Its totient is φ = 19613424.

The previous prime is 42495773. The next prime is 42495793. The reversal of 42495778 is 87759424.

It can be written as a sum of positive squares in 2 ways, for example, as 42029289 + 466489 = 6483^2 + 683^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×42495778² = 3611782295650568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42495773) 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, 817201 + ... + 817252.

Almost surely, 2^42495778 is an apocalyptic number.

42495778 is a deficient number, since it is larger than the sum of its proper divisors (26151290).

42495778 is a wasteful number, since it uses less digits than its factorization.

42495778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634468.

The product of its digits is 564480, while the sum is 46.

The square root of 42495778 is about 6518.8785845420. The cubic root of 42495778 is about 348.9650460474.

The spelling of 42495778 in words is "forty-two million, four hundred ninety-five thousand, seven hundred seventy-eight".