1240143012 has 18 divisors (see below), whose sum is σ = 3134806038. Its totient is φ = 413380992.

The previous prime is 1240143011. The next prime is 1240143017. The reversal of 1240143012 is 2103410421.

It can be written as a sum of positive squares in only one way, i.e., 1138657536 + 101485476 = 33744^2 + 10074^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×1240143012³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1240143011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17224173 + ... + 17224244.

It is an arithmetic number, because the mean of its divisors is an integer number (174155891).

Almost surely, 2^1240143012 is an apocalyptic number.

1240143012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1240143012 is an abundant number, since it is smaller than the sum of its proper divisors (1894663026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1240143012 is a wasteful number, since it uses less digits than its factorization.

1240143012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34448427 (or 34448422 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1240143012 is about 35215.6642987180. The cubic root of 1240143012 is about 1074.3783713080.

Adding to 1240143012 its reverse (2103410421), we get a palindrome (3343553433).

The spelling of 1240143012 in words is "one billion, two hundred forty million, one hundred forty-three thousand, twelve".