1240863 has 8 divisors (see below), whose sum is σ = 1781808. Its totient is φ = 763584.

The previous prime is 1240861. The next prime is 1240931. The reversal of 1240863 is 3680421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1240863 - 2¹ = 1240861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15870 + ... + 15947.

It is an arithmetic number, because the mean of its divisors is an integer number (222726).

2^1240863 is an apocalyptic number.

1240863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1240863 is a deficient number, since it is larger than the sum of its proper divisors (540945).

1240863 is a wasteful number, since it uses less digits than its factorization.

1240863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31833.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1240863 is about 1113.9403036070. The cubic root of 1240863 is about 107.4586247840.

The spelling of 1240863 in words is "one million, two hundred forty thousand, eight hundred sixty-three".