1240506043 has 4 divisors (see below), whose sum is σ = 1417721200. Its totient is φ = 1063290888.

The previous prime is 1240506019. The next prime is 1240506061. The reversal of 1240506043 is 3406050421.

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

It is a cyclic number.

It is not a de Polignac number, because 1240506043 - 2¹³ = 1240497851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240505999 and 1240506017.

It is not an unprimeable number, because it can be changed into a prime (1240506073) 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, 88607568 + ... + 88607581.

It is an arithmetic number, because the mean of its divisors is an integer number (354430300).

Almost surely, 2^1240506043 is an apocalyptic number.

1240506043 is a deficient number, since it is larger than the sum of its proper divisors (177215157).

1240506043 is an equidigital number, since it uses as much as digits as its factorization.

1240506043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177215156.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1240506043 is about 35220.8183181481. The cubic root of 1240506043 is about 1074.4831964770.

Adding to 1240506043 its reverse (3406050421), we get a palindrome (4646556464).

The spelling of 1240506043 in words is "one billion, two hundred forty million, five hundred six thousand, forty-three".