1025552161 has 4 divisors (see below), whose sum is σ = 1025991472. Its totient is φ = 1025112852.

The previous prime is 1025552159. The next prime is 1025552197. The reversal of 1025552161 is 1612555201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1025552161 - 2¹ = 1025552159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025552111) 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, 216135 + ... + 220828.

It is an arithmetic number, because the mean of its divisors is an integer number (256497868).

Almost surely, 2^1025552161 is an apocalyptic number.

It is an amenable number.

1025552161 is a deficient number, since it is larger than the sum of its proper divisors (439311).

1025552161 is an equidigital number, since it uses as much as digits as its factorization.

1025552161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439310.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 1025552161 is about 32024.2433322007. The cubic root of 1025552161 is about 1008.4458537336.

The spelling of 1025552161 in words is "one billion, twenty-five million, five hundred fifty-two thousand, one hundred sixty-one".