1242181039 has 8 divisors (see below), whose sum is σ = 1366307280. Its totient is φ = 1129254280.

The previous prime is 1242181037. The next prime is 1242181043. The reversal of 1242181039 is 9301812421.

It is not a de Polignac number, because 1242181039 - 2¹ = 1242181037 is a prime.

It is a super-2 number, since 2×1242181039² = 3086027467302239042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242181039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242181037) 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, 465304 + ... + 467965.

It is an arithmetic number, because the mean of its divisors is an integer number (170788410).

Almost surely, 2^1242181039 is an apocalyptic number.

1242181039 is a deficient number, since it is larger than the sum of its proper divisors (124126241).

1242181039 is an frugal number, since it uses more digits than its factorization.

1242181039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933302 (or 933280 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1242181039 is about 35244.5887903377. The cubic root of 1242181039 is about 1074.9665867386.

It can be divided in two parts, 1242 and 181039, that added together give a palindrome (182281).

The spelling of 1242181039 in words is "one billion, two hundred forty-two million, one hundred eighty-one thousand, thirty-nine".