1213420001 has 8 divisors (see below), whose sum is σ = 1278947880. Its totient is φ = 1149471232.

The previous prime is 1213419983. The next prime is 1213420003. The reversal of 1213420001 is 1000243121.

It can be written as a sum of positive squares in 4 ways, for example, as 689010001 + 524410000 = 26249^2 + 22900^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213420001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213420003) 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, 393200 + ... + 396273.

It is an arithmetic number, because the mean of its divisors is an integer number (159868485).

Almost surely, 2^1213420001 is an apocalyptic number.

It is an amenable number.

1213420001 is a deficient number, since it is larger than the sum of its proper divisors (65527879).

1213420001 is an equidigital number, since it uses as much as digits as its factorization.

1213420001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789555.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1213420001 is about 34834.1786324868. The cubic root of 1213420001 is about 1066.6052484927.

Adding to 1213420001 its reverse (1000243121), we get a palindrome (2213663122).

The spelling of 1213420001 in words is "one billion, two hundred thirteen million, four hundred twenty thousand, one".