1240151144 has 8 divisors (see below), whose sum is σ = 2325283410. Its totient is φ = 620075568.

The previous prime is 1240151141. The next prime is 1240151161. The reversal of 1240151144 is 4411510421.

It can be written as a sum of positive squares in only one way, i.e., 1239744100 + 407044 = 35210^2 + 638^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1240151141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77509439 + ... + 77509454.

Almost surely, 2^1240151144 is an apocalyptic number.

It is an amenable number.

1240151144 is a deficient number, since it is larger than the sum of its proper divisors (1085132266).

1240151144 is a wasteful number, since it uses less digits than its factorization.

1240151144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155018899 (or 155018895 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1240151144 is about 35215.7797585117. The cubic root of 1240151144 is about 1074.3807196463.

Adding to 1240151144 its reverse (4411510421), we get a palindrome (5651661565).

The spelling of 1240151144 in words is "one billion, two hundred forty million, one hundred fifty-one thousand, one hundred forty-four".