1242372732449 has 2 divisors, whose sum is σ = 1242372732450. Its totient is φ = 1242372732448.

The previous prime is 1242372732389. The next prime is 1242372732551. The reversal of 1242372732449 is 9442372732421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656696295424 + 585676437025 = 810368^2 + 765295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242372732449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242372732397 and 1242372732406.

It is not a weakly prime, because it can be changed into another prime (1242372735449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621186366224 + 621186366225.

It is an arithmetic number, because the mean of its divisors is an integer number (621186366225).

Almost surely, 2^{1242372732449} is an apocalyptic number.

It is an amenable number.

1242372732449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242372732449 is an equidigital number, since it uses as much as digits as its factorization.

1242372732449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 50.

The spelling of 1242372732449 in words is "one trillion, two hundred forty-two billion, three hundred seventy-two million, seven hundred thirty-two thousand, four hundred forty-nine".