715240781 has 4 divisors (see below), whose sum is σ = 715301472. Its totient is φ = 715180092.

The previous prime is 715240753. The next prime is 715240789. The reversal of 715240781 is 187042517.

715240781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 715240781 - 2¹⁰ = 715239757 is a prime.

It is a super-2 number, since 2×715240781² = 1023138749610979922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (715240789) 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, 6335 + ... + 38348.

It is an arithmetic number, because the mean of its divisors is an integer number (178825368).

Almost surely, 2^715240781 is an apocalyptic number.

It is an amenable number.

715240781 is a deficient number, since it is larger than the sum of its proper divisors (60691).

715240781 is a wasteful number, since it uses less digits than its factorization.

715240781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60690.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 715240781 is about 26743.9858846807. The cubic root of 715240781 is about 894.3017684965.

The spelling of 715240781 in words is "seven hundred fifteen million, two hundred forty thousand, seven hundred eighty-one".