1025161 has 2 divisors, whose sum is σ = 1025162. Its totient is φ = 1025160.

The previous prime is 1025153. The next prime is 1025197. The reversal of 1025161 is 1615201.

It is a happy number.

1025161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 577600 + 447561 = 760^2 + 669^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025161 - 2³ = 1025153 is a prime.

1025161 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1025111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512580 + 512581.

It is an arithmetic number, because the mean of its divisors is an integer number (512581).

2^1025161 is an apocalyptic number.

It is an amenable number.

1025161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025161 is an equidigital number, since it uses as much as digits as its factorization.

1025161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1025161 is about 1012.5023456763. The cubic root of 1025161 is about 100.8317625297.

It can be divided in two parts, 1025 and 161, that multiplied together give a triangular number (165025 = T₅₇₄).

The spelling of 1025161 in words is "one million, twenty-five thousand, one hundred sixty-one".