1240342277 has 2 divisors, whose sum is σ = 1240342278. Its totient is φ = 1240342276.

The previous prime is 1240342261. The next prime is 1240342331. The reversal of 1240342277 is 7722430421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1191216196 + 49126081 = 34514^2 + 7009^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240342277 - 2⁴ = 1240342261 is a prime.

It is a super-2 number, since 2×1240342277² = 3076897928227089458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240342217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620171138 + 620171139.

It is an arithmetic number, because the mean of its divisors is an integer number (620171139).

Almost surely, 2^1240342277 is an apocalyptic number.

It is an amenable number.

1240342277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240342277 is an equidigital number, since it uses as much as digits as its factorization.

1240342277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 1240342277 is about 35218.4933948061. The cubic root of 1240342277 is about 1074.4359115913.

Adding to 1240342277 its reverse (7722430421), we get a palindrome (8962772698).

The spelling of 1240342277 in words is "one billion, two hundred forty million, three hundred forty-two thousand, two hundred seventy-seven".