1240156163 has 8 divisors (see below), whose sum is σ = 1335787200. Its totient is φ = 1147561128.

The previous prime is 1240156157. The next prime is 1240156189. The reversal of 1240156163 is 3616510421.

It is a happy number.

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 1240156163 - 2¹⁶ = 1240090627 is a prime.

It is a super-3 number, since 3×1240156163³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240156363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758153 + ... + 759786.

It is an arithmetic number, because the mean of its divisors is an integer number (166973400).

Almost surely, 2^1240156163 is an apocalyptic number.

1240156163 is a deficient number, since it is larger than the sum of its proper divisors (95631037).

1240156163 is a wasteful number, since it uses less digits than its factorization.

1240156163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518001.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1240156163 is about 35215.8510191079. The cubic root of 1240156163 is about 1074.3821690152.

Adding to 1240156163 its reverse (3616510421), we get a palindrome (4856666584).

The spelling of 1240156163 in words is "one billion, two hundred forty million, one hundred fifty-six thousand, one hundred sixty-three".