1240154156 has 24 divisors (see below), whose sum is σ = 2208869040. Its totient is φ = 609076800.

The previous prime is 1240154143. The next prime is 1240154159. The reversal of 1240154156 is 6514510421.

It is not an unprimeable number, because it can be changed into a prime (1240154159) 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, 199211 + ... + 205341.

It is an arithmetic number, because the mean of its divisors is an integer number (92036210).

Almost surely, 2^1240154156 is an apocalyptic number.

It is an amenable number.

1240154156 is a deficient number, since it is larger than the sum of its proper divisors (968714884).

1240154156 is a wasteful number, since it uses less digits than its factorization.

1240154156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025 (or 7023 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1240154156 is about 35215.8225234056. The cubic root of 1240154156 is about 1074.3815894414.

Adding to 1240154156 its reverse (6514510421), we get a palindrome (7754664577).

The spelling of 1240154156 in words is "one billion, two hundred forty million, one hundred fifty-four thousand, one hundred fifty-six".