42415040 has 28 divisors (see below), whose sum is σ = 101001576. Its totient is φ = 16965888.

The previous prime is 42415039. The next prime is 42415067. The reversal of 42415040 is 4051424.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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, 65954 + ... + 66593.

Almost surely, 2^42415040 is an apocalyptic number.

42415040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42415040 is an abundant number, since it is smaller than the sum of its proper divisors (58586536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42415040 is a wasteful number, since it uses less digits than its factorization.

42415040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132564 (or 132554 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 42415040 is about 6512.6830108643. The cubic root of 42415040 is about 348.7439056330.

Adding to 42415040 its reverse (4051424), we get a palindrome (46466464).

The spelling of 42415040 in words is "forty-two million, four hundred fifteen thousand, forty".