1206244642457 has 4 divisors (see below), whose sum is σ = 1206268037940. Its totient is φ = 1206221246976.

The previous prime is 1206244642453. The next prime is 1206244642507. The reversal of 1206244642457 is 7542464426021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1196258437696 + 9986204761 = 1093736^2 + 99931^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206244642457 - 2² = 1206244642453 is a prime.

It is a super-2 number, since 2×1206244642457² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1206244642453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11620232 + ... + 11723577.

It is an arithmetic number, because the mean of its divisors is an integer number (301567009485).

Almost surely, 2^{1206244642457} is an apocalyptic number.

It is an amenable number.

1206244642457 is a deficient number, since it is larger than the sum of its proper divisors (23395483).

1206244642457 is an equidigital number, since it uses as much as digits as its factorization.

1206244642457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23395482.

The product of its (nonzero) digits is 2580480, while the sum is 47.

The spelling of 1206244642457 in words is "one trillion, two hundred six billion, two hundred forty-four million, six hundred forty-two thousand, four hundred fifty-seven".