1240813 has 8 divisors (see below), whose sum is σ = 1501632. Its totient is φ = 1000896.

The previous prime is 1240807. The next prime is 1240817. The reversal of 1240813 is 3180421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240813 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 (1240817) 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, 5095 + ... + 5332.

It is an arithmetic number, because the mean of its divisors is an integer number (187704).

2^1240813 is an apocalyptic number.

It is an amenable number.

1240813 is a deficient number, since it is larger than the sum of its proper divisors (260819).

1240813 is a wasteful number, since it uses less digits than its factorization.

1240813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10451.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1240813 is about 1113.9178605265. The cubic root of 1240813 is about 107.4571814328.

It can be divided in two parts, 12408 and 13, that added together give a palindrome (12421).

The spelling of 1240813 in words is "one million, two hundred forty thousand, eight hundred thirteen".