1240255051 has 16 divisors (see below), whose sum is σ = 1440004608. Its totient is φ = 1046203200.

The previous prime is 1240255031. The next prime is 1240255057. The reversal of 1240255051 is 1505520421.

It is not a de Polignac number, because 1240255051 - 2⁷ = 1240254923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240255057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317631 + ... + 321511.

It is an arithmetic number, because the mean of its divisors is an integer number (90000288).

Almost surely, 2^1240255051 is an apocalyptic number.

1240255051 is a deficient number, since it is larger than the sum of its proper divisors (199749557).

1240255051 is an equidigital number, since it uses as much as digits as its factorization.

1240255051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1240255051 is about 35217.2550179596. The cubic root of 1240255051 is about 1074.4107247416.

Adding to 1240255051 its reverse (1505520421), we get a palindrome (2745775472).

The spelling of 1240255051 in words is "one billion, two hundred forty million, two hundred fifty-five thousand, fifty-one".