1205754251087 has 2 divisors, whose sum is σ = 1205754251088. Its totient is φ = 1205754251086.

The previous prime is 1205754251027. The next prime is 1205754251089. The reversal of 1205754251087 is 7801524575021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1205754251087 - 2¹⁶ = 1205754185551 is a prime.

Together with 1205754251089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205754251089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602877125543 + 602877125544.

It is an arithmetic number, because the mean of its divisors is an integer number (602877125544).

Almost surely, 2^{1205754251087} is an apocalyptic number.

1205754251087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205754251087 is an equidigital number, since it uses as much as digits as its factorization.

1205754251087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784000, while the sum is 47.

The spelling of 1205754251087 in words is "one trillion, two hundred five billion, seven hundred fifty-four million, two hundred fifty-one thousand, eighty-seven".