1243132001 has 2 divisors, whose sum is σ = 1243132002. Its totient is φ = 1243132000.

The previous prime is 1243131983. The next prime is 1243132061. The reversal of 1243132001 is 1002313421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1242492001 + 640000 = 35249^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243132001 - 2¹⁴ = 1243115617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243132061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621566000 + 621566001.

It is an arithmetic number, because the mean of its divisors is an integer number (621566001).

Almost surely, 2^1243132001 is an apocalyptic number.

It is an amenable number.

1243132001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243132001 is an equidigital number, since it uses as much as digits as its factorization.

1243132001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1243132001 is about 35258.0771029845. The cubic root of 1243132001 is about 1075.2408332962.

Adding to 1243132001 its reverse (1002313421), we get a palindrome (2245445422).

The spelling of 1243132001 in words is "one billion, two hundred forty-three million, one hundred thirty-two thousand, one".