1240343143 has 8 divisors (see below), whose sum is σ = 1344602336. Its totient is φ = 1137348000.

The previous prime is 1240343131. The next prime is 1240343147. The reversal of 1240343143 is 3413430421.

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

It is a cyclic number.

It is not a de Polignac number, because 1240343143 - 2¹³ = 1240334951 is a prime.

It is a super-2 number, since 2×1240343143² = 3076902224774236898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240343147) 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, 313968 + ... + 317893.

It is an arithmetic number, because the mean of its divisors is an integer number (168075292).

Almost surely, 2^1240343143 is an apocalyptic number.

1240343143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1240343143 is a deficient number, since it is larger than the sum of its proper divisors (104259193).

1240343143 is a wasteful number, since it uses less digits than its factorization.

1240343143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632025.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 1240343143 is about 35218.5056894809. The cubic root of 1240343143 is about 1074.4361616463.

Adding to 1240343143 its reverse (3413430421), we get a palindrome (4653773564).

The spelling of 1240343143 in words is "one billion, two hundred forty million, three hundred forty-three thousand, one hundred forty-three".