1240140051 has 72 divisors (see below), whose sum is σ = 1999268544. Its totient is φ = 767899440.

The previous prime is 1240140049. The next prime is 1240140067. The reversal of 1240140051 is 1500410421.

It is not a de Polignac number, because 1240140051 - 2¹ = 1240140049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240140001) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5877336 + ... + 5877546.

Almost surely, 2^1240140051 is an apocalyptic number.

1240140051 is a deficient number, since it is larger than the sum of its proper divisors (759128493).

1240140051 is an equidigital number, since it uses as much as digits as its factorization.

1240140051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1240140051 is about 35215.6222577424. The cubic root of 1240140051 is about 1074.3775162354.

Adding to 1240140051 its reverse (1500410421), we get a palindrome (2740550472).

The spelling of 1240140051 in words is "one billion, two hundred forty million, one hundred forty thousand, fifty-one".