1240559497 has 4 divisors (see below), whose sum is σ = 1240920580. Its totient is φ = 1240198416.

The previous prime is 1240559491. The next prime is 1240559527. The reversal of 1240559497 is 7949550421.

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 718025616 + 522533881 = 26796^2 + 22859^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240559497 - 2²³ = 1232170889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240559491) 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 3 ways as a sum of consecutive naturals, for example, 175338 + ... + 182275.

It is an arithmetic number, because the mean of its divisors is an integer number (310230145).

Almost surely, 2^1240559497 is an apocalyptic number.

It is an amenable number.

1240559497 is a deficient number, since it is larger than the sum of its proper divisors (361083).

1240559497 is an equidigital number, since it uses as much as digits as its factorization.

1240559497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361082.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 1240559497 is about 35221.5771509454. The cubic root of 1240559497 is about 1074.4986295873.

The spelling of 1240559497 in words is "one billion, two hundred forty million, five hundred fifty-nine thousand, four hundred ninety-seven".