1240280071 has 4 divisors (see below), whose sum is σ = 1273801192. Its totient is φ = 1206758952.

The previous prime is 1240280047. The next prime is 1240280087. The reversal of 1240280071 is 1700820421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1700820421 = 389 ⋅4372289.

It is a cyclic number.

It is not a de Polignac number, because 1240280071 - 2¹⁷ = 1240148999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240220071) 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, 16760505 + ... + 16760578.

It is an arithmetic number, because the mean of its divisors is an integer number (318450298).

Almost surely, 2^1240280071 is an apocalyptic number.

1240280071 is a deficient number, since it is larger than the sum of its proper divisors (33521121).

1240280071 is an equidigital number, since it uses as much as digits as its factorization.

1240280071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33521120.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 1240280071 is about 35217.6102397650. The cubic root of 1240280071 is about 1074.4179494855.

The spelling of 1240280071 in words is "one billion, two hundred forty million, two hundred eighty thousand, seventy-one".