1240343031 has 8 divisors (see below), whose sum is σ = 1668426480. Its totient is φ = 819577472.

The previous prime is 1240342997. The next prime is 1240343051. The reversal of 1240343031 is 1303430421.

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-1240343031 is a prime.

It is a super-2 number, since 2×1240343031² = 3076901669100533922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1240342989 and 1240343007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240343051) 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, 1829076 + ... + 1829753.

It is an arithmetic number, because the mean of its divisors is an integer number (208553310).

Almost surely, 2^1240343031 is an apocalyptic number.

1240343031 is a deficient number, since it is larger than the sum of its proper divisors (428083449).

1240343031 is a wasteful number, since it uses less digits than its factorization.

1240343031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3658945.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1240343031 is about 35218.5040994077. The cubic root of 1240343031 is about 1074.4361293067.

Adding to 1240343031 its reverse (1303430421), we get a palindrome (2543773452).

The spelling of 1240343031 in words is "one billion, two hundred forty million, three hundred forty-three thousand, thirty-one".