42520004 has 6 divisors (see below), whose sum is σ = 74410014. Its totient is φ = 21260000.

The previous prime is 42519959. The next prime is 42520021. The reversal of 42520004 is 40002524.

It can be written as a sum of positive squares in only one way, i.e., 42510400 + 9604 = 6520^2 + 98^2 .

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 as a sum of consecutive naturals, namely, 5314997 + ... + 5315004.

It is an arithmetic number, because the mean of its divisors is an integer number (12401669).

Almost surely, 2^42520004 is an apocalyptic number.

It is an amenable number.

42520004 is a deficient number, since it is larger than the sum of its proper divisors (31890010).

42520004 is a wasteful number, since it uses less digits than its factorization.

42520004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10630005 (or 10630003 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 42520004 is about 6520.7364614743. The cubic root of 42520004 is about 349.0313461335.

Adding to 42520004 its reverse (40002524), we get a palindrome (82522528).

The spelling of 42520004 in words is "forty-two million, five hundred twenty thousand, four".