7878461 has 2 divisors, whose sum is σ = 7878462. Its totient is φ = 7878460.

The previous prime is 7878439. The next prime is 7878487. The reversal of 7878461 is 1648787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7344100 + 534361 = 2710^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 7878461 - 2¹⁰ = 7877437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7878421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3939230 + 3939231.

It is an arithmetic number, because the mean of its divisors is an integer number (3939231).

Almost surely, 2^7878461 is an apocalyptic number.

It is an amenable number.

7878461 is a deficient number, since it is larger than the sum of its proper divisors (1).

7878461 is an equidigital number, since it uses as much as digits as its factorization.

7878461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 41.

The square root of 7878461 is about 2806.8596331131. The cubic root of 7878461 is about 198.9820021938.

The spelling of 7878461 in words is "seven million, eight hundred seventy-eight thousand, four hundred sixty-one".