1240263 has 12 divisors (see below), whose sum is σ = 1886040. Its totient is φ = 783216.

The previous prime is 1240247. The next prime is 1240271. The reversal of 1240263 is 3620421.

It is a happy number.

It is not a de Polignac number, because 1240263 - 2⁴ = 1240247 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3456 + ... + 3797.

It is an arithmetic number, because the mean of its divisors is an integer number (157170).

2^1240263 is an apocalyptic number.

1240263 is a deficient number, since it is larger than the sum of its proper divisors (645777).

1240263 is a wasteful number, since it uses less digits than its factorization.

1240263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7278 (or 7275 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1240263 is about 1113.6709567911. The cubic root of 1240263 is about 107.4413020095.

Adding to 1240263 its reverse (3620421), we get a palindrome (4860684).

The spelling of 1240263 in words is "one million, two hundred forty thousand, two hundred sixty-three".