780061 has 2 divisors, whose sum is σ = 780062. Its totient is φ = 780060.

The previous prime is 780049. The next prime is 780119. The reversal of 780061 is 160087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 383161 = 630^2 + 619^2 .

It is an emirp because it is prime and its reverse (160087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 780061 - 2⁵ = 780029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390030 + 390031.

It is an arithmetic number, because the mean of its divisors is an integer number (390031).

2⁷⁸⁰⁰⁶¹ is an apocalyptic number.

It is an amenable number.

780061 is a deficient number, since it is larger than the sum of its proper divisors (1).

780061 is an equidigital number, since it uses as much as digits as its factorization.

780061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 780061 is about 883.2106204072. The cubic root of 780061 is about 92.0540403994.

It can be divided in two parts, 7800 and 61, that multiplied together give a triangular number (475800 = T₉₇₅).

The spelling of 780061 in words is "seven hundred eighty thousand, sixty-one".