1145161026 has 48 divisors (see below), whose sum is σ = 2553373368. Its totient is φ = 370656000.

The previous prime is 1145161009. The next prime is 1145161067. The reversal of 1145161026 is 6201615411.

1145161026 is a `hidden beast` number, since 1 + 1 + 45 + 1 + 610 + 2 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1142102025 + 3059001 = 33795^2 + 1749^2 .

It is a super-2 number, since 2×1145161026² = 2622787550938745352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398836 + ... + 401696.

Almost surely, 2^1145161026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145161026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1276686684).

1145161026 is an abundant number, since it is smaller than the sum of its proper divisors (1408212342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1145161026 is a wasteful number, since it uses less digits than its factorization.

1145161026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507 (or 3504 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1145161026 is about 33840.2279247643. The cubic root of 1145161026 is about 1046.2179966487.

Adding to 1145161026 its reverse (6201615411), we get a palindrome (7346776437).

The spelling of 1145161026 in words is "one billion, one hundred forty-five million, one hundred sixty-one thousand, twenty-six".