1140354161 has 4 divisors (see below), whose sum is σ = 1148678052. Its totient is φ = 1132030272.

The previous prime is 1140354157. The next prime is 1140354167. The reversal of 1140354161 is 1614530411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 549621136 + 590733025 = 23444^2 + 24305^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140354161 - 2² = 1140354157 is a prime.

It is a super-2 number, since 2×1140354161² = 2600815225020027842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1140354161.

It is not an unprimeable number, because it can be changed into a prime (1140354167) 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, 4161740 + ... + 4162013.

It is an arithmetic number, because the mean of its divisors is an integer number (287169513).

Almost surely, 2^1140354161 is an apocalyptic number.

It is an amenable number.

1140354161 is a deficient number, since it is larger than the sum of its proper divisors (8323891).

1140354161 is an equidigital number, since it uses as much as digits as its factorization.

1140354161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8323890.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1140354161 is about 33769.1302967666. The cubic root of 1140354161 is about 1044.7520946093.

Adding to 1140354161 its reverse (1614530411), we get a palindrome (2754884572).

The spelling of 1140354161 in words is "one billion, one hundred forty million, three hundred fifty-four thousand, one hundred sixty-one".