42515415 has 32 divisors (see below), whose sum is σ = 78028800. Its totient is φ = 21941280.

The previous prime is 42515411. The next prime is 42515437. The reversal of 42515415 is 51451524.

It is not a de Polignac number, because 42515415 - 2² = 42515411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42515411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 895 + ... + 9264.

It is an arithmetic number, because the mean of its divisors is an integer number (2438400).

Almost surely, 2^42515415 is an apocalyptic number.

42515415 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42515415 is a deficient number, since it is larger than the sum of its proper divisors (35513385).

42515415 is a wasteful number, since it uses less digits than its factorization.

42515415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10204 (or 10198 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 42515415 is about 6520.3845745477. The cubic root of 42515415 is about 349.0187892009.

Adding to 42515415 its reverse (51451524), we get a palindrome (93966939).

The spelling of 42515415 in words is "forty-two million, five hundred fifteen thousand, four hundred fifteen".