1240484881 has 4 divisors (see below), whose sum is σ = 1241235172. Its totient is φ = 1239734592.

The previous prime is 1240484827. The next prime is 1240484893. The reversal of 1240484881 is 1884840421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 388720656 + 851764225 = 19716^2 + 29185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240484881 - 2²⁵ = 1206930449 is a prime.

It is a super-2 number, since 2×1240484881² = 3077605479979168322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240484801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372660 + ... + 375973.

It is an arithmetic number, because the mean of its divisors is an integer number (310308793).

Almost surely, 2^1240484881 is an apocalyptic number.

It is an amenable number.

1240484881 is a deficient number, since it is larger than the sum of its proper divisors (750291).

1240484881 is an equidigital number, since it uses as much as digits as its factorization.

1240484881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750290.

The product of its (nonzero) digits is 65536, while the sum is 40.

The square root of 1240484881 is about 35220.5178979526. The cubic root of 1240484881 is about 1074.4770865127.

The spelling of 1240484881 in words is "one billion, two hundred forty million, four hundred eighty-four thousand, eight hundred eighty-one".