1205350425251 has 4 divisors (see below), whose sum is σ = 1377543343152. Its totient is φ = 1033157507352.

The previous prime is 1205350425233. The next prime is 1205350425259. The reversal of 1205350425251 is 1525240535021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1205350425251 - 2³⁸ = 930472518307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205350425259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86096458940 + ... + 86096458953.

It is an arithmetic number, because the mean of its divisors is an integer number (344385835788).

Almost surely, 2^{1205350425251} is an apocalyptic number.

1205350425251 is a deficient number, since it is larger than the sum of its proper divisors (172192917901).

1205350425251 is an equidigital number, since it uses as much as digits as its factorization.

1205350425251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172192917900.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 1205350425251 in words is "one trillion, two hundred five billion, three hundred fifty million, four hundred twenty-five thousand, two hundred fifty-one".