76212405 has 24 divisors (see below), whose sum is σ = 132787512. Its totient is φ = 40435584.

The previous prime is 76212379. The next prime is 76212407. The reversal of 76212405 is 50421267.

It can be written as a sum of positive squares in 4 ways, for example, as 35533521 + 40678884 = 5961^2 + 6378^2 .

It is not a de Polignac number, because 76212405 - 2¹¹ = 76210357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76212407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4567 + ... + 13163.

It is an arithmetic number, because the mean of its divisors is an integer number (5532813).

Almost surely, 2^76212405 is an apocalyptic number.

It is an amenable number.

76212405 is a deficient number, since it is larger than the sum of its proper divisors (56575107).

76212405 is a wasteful number, since it uses less digits than its factorization.

76212405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8805 (or 8802 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 76212405 is about 8729.9716494385. The cubic root of 76212405 is about 423.9766010732.

The spelling of 76212405 in words is "seventy-six million, two hundred twelve thousand, four hundred five".