1025205133 has 4 divisors (see below), whose sum is σ = 1031735260. Its totient is φ = 1018675008.

The previous prime is 1025205131. The next prime is 1025205149. The reversal of 1025205133 is 3315025201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3315025201 = 2281 ⋅1453321.

It can be written as a sum of positive squares in 2 ways, for example, as 335512489 + 689692644 = 18317^2 + 26262^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025205133 - 2¹ = 1025205131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025205131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3264828 + ... + 3265141.

It is an arithmetic number, because the mean of its divisors is an integer number (257933815).

Almost surely, 2^1025205133 is an apocalyptic number.

It is an amenable number.

1025205133 is a deficient number, since it is larger than the sum of its proper divisors (6530127).

1025205133 is an equidigital number, since it uses as much as digits as its factorization.

1025205133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530126.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1025205133 is about 32018.8246661241. The cubic root of 1025205133 is about 1008.3320943879.

The spelling of 1025205133 in words is "one billion, twenty-five million, two hundred five thousand, one hundred thirty-three".