1243155006241 has 8 divisors (see below), whose sum is σ = 1317522395304. Its totient is φ = 1168925464320.

The previous prime is 1243155006239. The next prime is 1243155006347. The reversal of 1243155006241 is 1426005513421.

It can be written as a sum of positive squares in 4 ways, for example, as 713018115216 + 530136891025 = 844404^2 + 728105^2 .

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 1243155006241 - 2¹ = 1243155006239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243155006197 and 1243155006206.

It is not an unprimeable number, because it can be changed into a prime (1243155006941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34443210 + ... + 34479283.

It is an arithmetic number, because the mean of its divisors is an integer number (164690299413).

Almost surely, 2^{1243155006241} is an apocalyptic number.

It is an amenable number.

1243155006241 is a deficient number, since it is larger than the sum of its proper divisors (74367389063).

1243155006241 is a wasteful number, since it uses less digits than its factorization.

1243155006241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68923571.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 1243155006241 in words is "one trillion, two hundred forty-three billion, one hundred fifty-five million, six thousand, two hundred forty-one".