1230172421 has 8 divisors (see below), whose sum is σ = 1267471704. Its totient is φ = 1193425920.

The previous prime is 1230172403. The next prime is 1230172451. The reversal of 1230172421 is 1242710321.

It can be written as a sum of positive squares in 4 ways, for example, as 222427396 + 1007745025 = 14914^2 + 31745^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1230172421 - 2¹⁸ = 1229910277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230172451) 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 7 ways as a sum of consecutive naturals, for example, 133676 + ... + 142581.

It is an arithmetic number, because the mean of its divisors is an integer number (158433963).

Almost surely, 2^1230172421 is an apocalyptic number.

It is an amenable number.

1230172421 is a deficient number, since it is larger than the sum of its proper divisors (37299283).

1230172421 is an equidigital number, since it uses as much as digits as its factorization.

1230172421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276391.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1230172421 is about 35073.8138929886. The cubic root of 1230172421 is about 1071.4913321145.

Adding to 1230172421 its reverse (1242710321), we get a palindrome (2472882742).

The spelling of 1230172421 in words is "one billion, two hundred thirty million, one hundred seventy-two thousand, four hundred twenty-one".