1023455161 has 4 divisors (see below), whose sum is σ = 1048417524. Its totient is φ = 998492800.

The previous prime is 1023455149. The next prime is 1023455189. The reversal of 1023455161 is 1615543201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1615543201 = 17 ⋅95031953.

It can be written as a sum of positive squares in 2 ways, for example, as 70560000 + 952895161 = 8400^2 + 30869^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023455161 - 2¹³ = 1023446969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023455561) 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, 12481120 + ... + 12481201.

It is an arithmetic number, because the mean of its divisors is an integer number (262104381).

Almost surely, 2^1023455161 is an apocalyptic number.

It is an amenable number.

1023455161 is a deficient number, since it is larger than the sum of its proper divisors (24962363).

1023455161 is an equidigital number, since it uses as much as digits as its factorization.

1023455161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24962362.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1023455161 is about 31991.4857579325. The cubic root of 1023455161 is about 1007.7580441065.

Adding to 1023455161 its reverse (1615543201), we get a palindrome (2638998362).

The spelling of 1023455161 in words is "one billion, twenty-three million, four hundred fifty-five thousand, one hundred sixty-one".