36420421 has 4 divisors (see below), whose sum is σ = 36442144. Its totient is φ = 36398700.

The previous prime is 36420413. The next prime is 36420427. The reversal of 36420421 is 12402463.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12402463 = 1279 ⋅9697.

It is a cyclic number.

It is not a de Polignac number, because 36420421 - 2³ = 36420413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 36420392 and 36420401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36420427) 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, 8115 + ... + 11776.

It is an arithmetic number, because the mean of its divisors is an integer number (9110536).

Almost surely, 2^36420421 is an apocalyptic number.

It is an amenable number.

36420421 is a deficient number, since it is larger than the sum of its proper divisors (21723).

36420421 is a wasteful number, since it uses less digits than its factorization.

36420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21722.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 36420421 is about 6034.9333881991. The cubic root of 36420421 is about 331.4731233902.

Adding to 36420421 its reverse (12402463), we get a palindrome (48822884).

The spelling of 36420421 in words is "thirty-six million, four hundred twenty thousand, four hundred twenty-one".