42505412 has 6 divisors (see below), whose sum is σ = 74384478. Its totient is φ = 21252704.

The previous prime is 42505381. The next prime is 42505427. The reversal of 42505412 is 21450524.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28472896 + 14032516 = 5336^2 + 3746^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5313173 + ... + 5313180.

It is an arithmetic number, because the mean of its divisors is an integer number (12397413).

Almost surely, 2^42505412 is an apocalyptic number.

It is an amenable number.

42505412 is a deficient number, since it is larger than the sum of its proper divisors (31879066).

42505412 is a wasteful number, since it uses less digits than its factorization.

42505412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10626357 (or 10626355 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42505412 is about 6519.6174734412. The cubic root of 42505412 is about 348.9914147471.

Adding to 42505412 its reverse (21450524), we get a palindrome (63955936).

The spelling of 42505412 in words is "forty-two million, five hundred five thousand, four hundred twelve".