40420515 has 16 divisors (see below), whose sum is σ = 64776096. Its totient is φ = 21523200.

The previous prime is 40420493. The next prime is 40420529. The reversal of 40420515 is 51502404.

It is not a de Polignac number, because 40420515 - 2⁵ = 40420483 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40420491 and 40420500.

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 15 ways as a sum of consecutive naturals, for example, 9645 + ... + 13185.

It is an arithmetic number, because the mean of its divisors is an integer number (4048506).

Almost surely, 2^40420515 is an apocalyptic number.

40420515 is a deficient number, since it is larger than the sum of its proper divisors (24355581).

40420515 is a wasteful number, since it uses less digits than its factorization.

40420515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 40420515 is about 6357.7130322153. The cubic root of 40420515 is about 343.1894648637.

Adding to 40420515 its reverse (51502404), we get a palindrome (91922919).

The spelling of 40420515 in words is "forty million, four hundred twenty thousand, five hundred fifteen".