780242725 has 6 divisors (see below), whose sum is σ = 967501010. Its totient is φ = 624194160.

The previous prime is 780242707. The next prime is 780242737. The reversal of 780242725 is 527242087.

It can be written as a sum of positive squares in 3 ways, for example, as 4397409 + 775845316 = 2097^2 + 27854^2 .

It is not a de Polignac number, because 780242725 - 2⁷ = 780242597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15604830 + ... + 15604879.

Almost surely, 2^780242725 is an apocalyptic number.

It is an amenable number.

780242725 is a deficient number, since it is larger than the sum of its proper divisors (187258285).

780242725 is a wasteful number, since it uses less digits than its factorization.

780242725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31209719 (or 31209714 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 780242725 is about 27932.8252240979. The cubic root of 780242725 is about 920.6118822571.

The spelling of 780242725 in words is "seven hundred eighty million, two hundred forty-two thousand, seven hundred twenty-five".