1025122428985 has 4 divisors (see below), whose sum is σ = 1230146914788. Its totient is φ = 820097943184.

The previous prime is 1025122428983. The next prime is 1025122428989. The reversal of 1025122428985 is 5898242215201.

It is a happy number.

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 217965729424 + 807156699561 = 466868^2 + 898419^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025122428985 - 2¹ = 1025122428983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025122428983) 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, 102512242894 + ... + 102512242903.

It is an arithmetic number, because the mean of its divisors is an integer number (307536728697).

Almost surely, 2^{1025122428985} is an apocalyptic number.

It is an amenable number.

1025122428985 is a deficient number, since it is larger than the sum of its proper divisors (205024485803).

1025122428985 is an equidigital number, since it uses as much as digits as its factorization.

1025122428985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205024485802.

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 1025122428985 in words is "one trillion, twenty-five billion, one hundred twenty-two million, four hundred twenty-eight thousand, nine hundred eighty-five".