1985325121 has 4 divisors (see below), whose sum is σ = 2138042452. Its totient is φ = 1832607792.

The previous prime is 1985325113. The next prime is 1985325151. The reversal of 1985325121 is 1215235891.

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 1126542096 + 858783025 = 33564^2 + 29305^2 .

It is a cyclic number.

It is not a de Polignac number, because 1985325121 - 2³ = 1985325113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1985325101) 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, 76358646 + ... + 76358671.

It is an arithmetic number, because the mean of its divisors is an integer number (534510613).

Almost surely, 2^1985325121 is an apocalyptic number.

It is an amenable number.

1985325121 is a deficient number, since it is larger than the sum of its proper divisors (152717331).

1985325121 is a wasteful number, since it uses less digits than its factorization.

1985325121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152717330.

The product of its digits is 21600, while the sum is 37.

The square root of 1985325121 is about 44556.9873420544. The cubic root of 1985325121 is about 1256.8319506778.

The spelling of 1985325121 in words is "one billion, nine hundred eighty-five million, three hundred twenty-five thousand, one hundred twenty-one".