1205249845951 has 2 divisors, whose sum is σ = 1205249845952. Its totient is φ = 1205249845950.

The previous prime is 1205249845913. The next prime is 1205249845981. The reversal of 1205249845951 is 1595489425021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1205249845951 - 2²¹ = 1205247748799 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1205249845892 and 1205249845901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205249845981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602624922975 + 602624922976.

It is an arithmetic number, because the mean of its divisors is an integer number (602624922976).

Almost surely, 2^{1205249845951} is an apocalyptic number.

1205249845951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205249845951 is an equidigital number, since it uses as much as digits as its factorization.

1205249845951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184000, while the sum is 55.

The spelling of 1205249845951 in words is "one trillion, two hundred five billion, two hundred forty-nine million, eight hundred forty-five thousand, nine hundred fifty-one".