40042515 has 16 divisors (see below), whose sum is σ = 64260000. Its totient is φ = 21292032.

The previous prime is 40042469. The next prime is 40042553. The reversal of 40042515 is 51524004.

It is not a de Polignac number, because 40042515 - 2⁶ = 40042451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40042491 and 40042500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1411 + ... + 9059.

It is an arithmetic number, because the mean of its divisors is an integer number (4016250).

Almost surely, 2^40042515 is an apocalyptic number.

40042515 is a deficient number, since it is larger than the sum of its proper divisors (24217485).

40042515 is a wasteful number, since it uses less digits than its factorization.

40042515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8006.

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

The square root of 40042515 is about 6327.9155335703. The cubic root of 40042515 is about 342.1163124782.

Adding to 40042515 its reverse (51524004), we get a palindrome (91566519).

The spelling of 40042515 in words is "forty million, forty-two thousand, five hundred fifteen".