1140263 has 4 divisors (see below), whose sum is σ = 1142400. Its totient is φ = 1138128.

The previous prime is 1140257. The next prime is 1140281. The reversal of 1140263 is 3620411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3620411 = 61 ⋅59351.

It is a cyclic number.

It is not a de Polignac number, because 1140263 - 2¹⁰ = 1139239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140203) 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, 506 + ... + 1592.

It is an arithmetic number, because the mean of its divisors is an integer number (285600).

2^1140263 is an apocalyptic number.

1140263 is a deficient number, since it is larger than the sum of its proper divisors (2137).

1140263 is a wasteful number, since it uses less digits than its factorization.

1140263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1140263 is about 1067.8309791348. The cubic root of 1140263 is about 104.4724254374.

Adding to 1140263 its reverse (3620411), we get a palindrome (4760674).

The spelling of 1140263 in words is "one million, one hundred forty thousand, two hundred sixty-three".