1578061 has 2 divisors, whose sum is σ = 1578062. Its totient is φ = 1578060.

The previous prime is 1578047. The next prime is 1578077. The reversal of 1578061 is 1608751.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1334025 + 244036 = 1155^2 + 494^2 .

It is an emirp because it is prime and its reverse (1608751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1578061 - 2⁵ = 1578029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1578001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 789030 + 789031.

It is an arithmetic number, because the mean of its divisors is an integer number (789031).

2^1578061 is an apocalyptic number.

It is an amenable number.

1578061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1578061 is an equidigital number, since it uses as much as digits as its factorization.

1578061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1578061 is about 1256.2089794298. The cubic root of 1578061 is about 116.4236638198.

The spelling of 1578061 in words is "one million, five hundred seventy-eight thousand, sixty-one".