76020421 has 4 divisors (see below), whose sum is σ = 76206700. Its totient is φ = 75834144.

The previous prime is 76020407. The next prime is 76020449. The reversal of 76020421 is 12402067.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51408900 + 24611521 = 7170^2 + 4961^2 .

It is a cyclic number.

It is not a de Polignac number, because 76020421 - 2⁵ = 76020389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76020392 and 76020401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76020491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92526 + ... + 93343.

It is an arithmetic number, because the mean of its divisors is an integer number (19051675).

Almost surely, 2^76020421 is an apocalyptic number.

It is an amenable number.

76020421 is a deficient number, since it is larger than the sum of its proper divisors (186279).

76020421 is a wasteful number, since it uses less digits than its factorization.

76020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186278.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 76020421 is about 8718.9690330910. The cubic root of 76020421 is about 423.6202935163.

Adding to 76020421 its reverse (12402067), we get a palindrome (88422488).

The spelling of 76020421 in words is "seventy-six million, twenty thousand, four hundred twenty-one".