42478497 has 12 divisors (see below), whose sum is σ = 61454484. Its totient is φ = 28274400.

The previous prime is 42478483. The next prime is 42478507. The reversal of 42478497 is 79487424.

It can be written as a sum of positive squares in 2 ways, for example, as 40335201 + 2143296 = 6351^2 + 1464^2 .

It is not a de Polignac number, because 42478497 - 2¹¹ = 42476449 is a prime.

It is a super-3 number, since 3×42478497³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (42478477) 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, 2943 + ... + 9675.

It is an arithmetic number, because the mean of its divisors is an integer number (5121207).

Almost surely, 2^42478497 is an apocalyptic number.

It is an amenable number.

42478497 is a deficient number, since it is larger than the sum of its proper divisors (18975987).

42478497 is a wasteful number, since it uses less digits than its factorization.

42478497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7440 (or 7437 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 42478497 is about 6517.5529917293. The cubic root of 42478497 is about 348.9177371705.

The spelling of 42478497 in words is "forty-two million, four hundred seventy-eight thousand, four hundred ninety-seven".