246430021 has 4 divisors (see below), whose sum is σ = 246692844. Its totient is φ = 246167200.

The previous prime is 246430013. The next prime is 246430091. The reversal of 246430021 is 120034642.

It is a happy number.

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 179828100 + 66601921 = 13410^2 + 8161^2 .

It is a cyclic number.

It is not a de Polignac number, because 246430021 - 2³ = 246430013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 246429974 and 246430001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (246430091) 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 3 ways as a sum of consecutive naturals, for example, 130000 + ... + 131881.

It is an arithmetic number, because the mean of its divisors is an integer number (61673211).

Almost surely, 2^246430021 is an apocalyptic number.

It is an amenable number.

246430021 is a deficient number, since it is larger than the sum of its proper divisors (262823).

246430021 is an equidigital number, since it uses as much as digits as its factorization.

246430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262822.

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

The square root of 246430021 is about 15698.0897245493. The cubic root of 246430021 is about 626.9475429389.

Adding to 246430021 its reverse (120034642), we get a palindrome (366464663).

The spelling of 246430021 in words is "two hundred forty-six million, four hundred thirty thousand, twenty-one".