1240155051 has 16 divisors (see below), whose sum is σ = 1662845184. Its totient is φ = 822131424.

The previous prime is 1240155029. The next prime is 1240155053. The reversal of 1240155051 is 1505510421.

It is not a de Polignac number, because 1240155051 - 2²³ = 1231766443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240155053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461925 + ... + 464601.

It is an arithmetic number, because the mean of its divisors is an integer number (103927824).

Almost surely, 2^1240155051 is an apocalyptic number.

1240155051 is a deficient number, since it is larger than the sum of its proper divisors (422690133).

1240155051 is a wasteful number, since it uses less digits than its factorization.

1240155051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 1240155051 is about 35215.8352307595. The cubic root of 1240155051 is about 1074.3818478961.

Adding to 1240155051 its reverse (1505510421), we get a palindrome (2745665472).

The spelling of 1240155051 in words is "one billion, two hundred forty million, one hundred fifty-five thousand, fifty-one".