42015502 has 4 divisors (see below), whose sum is σ = 63023256. Its totient is φ = 21007750.

The previous prime is 42015487. The next prime is 42015527. The reversal of 42015502 is 20551024.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42015502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10503874 + ... + 10503877.

It is an arithmetic number, because the mean of its divisors is an integer number (15755814).

Almost surely, 2^42015502 is an apocalyptic number.

42015502 is a deficient number, since it is larger than the sum of its proper divisors (21007754).

42015502 is a wasteful number, since it uses less digits than its factorization.

42015502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21007753.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 42015502 is about 6481.9365933338. The cubic root of 42015502 is about 347.6454253909.

Adding to 42015502 its reverse (20551024), we get a palindrome (62566526).

The spelling of 42015502 in words is "forty-two million, fifteen thousand, five hundred two".